What Makes a Good Coffee? Understanding Extraction Yield with the Atago Refractometer
Oct 5, 2026 · Tolga SeçkinYou finish your cup, and can’t help but think that something special was there — sweetness, a kind of balance, the pull to drink it again. But you can't quite say why it worked. Do you leave that to chance, or do you try to replicate the experience? That's the question Atago is built to answer. Taste vs. Data In coffee, "good" is often treated as something personal — it depends on the origin, the barista, or how your morning is going. But decades of research by the Specialty Coffee Association (SCA) point to something more concrete: good coffee has a measurable definition. That definition lives in a number called Extraction Yield. A coffee bean holds hundreds of compounds — acids, sugars, lipids, amino acids. However, you don't want all of them in your cup. When the right percentage is in place, flavour lands in balance. Too little or too much, and something goes wrong. Finding that window consistently is what the measurement is for. What Is Extraction Yield and Why Does It Matter? Extraction Yield (EY) tells you what percentage of the soluble material in your ground coffee made it into the liquid. The SCA target range is 18% to 22%. How Does the Atago Refractometer Work? Atago measures the concentration of dissolved solids in your coffee — called TDS (Total Dissolved Solids) — through light refraction. You place a few drops on the prism; as light passes through, the dissolved compounds bend it. The device converts that bend into a percentage. TDS alone doesn't give you the full picture. For extraction yield, you need this formula: EY (%) = [ TDS (%) × Brewed Coffee (g) ] ÷ Ground Coffee (g) Three numbers: the TDS from Atago, the weight of liquid in your cup, and the weight of ground coffee you started with. That's all it takes. Step by Step: Calculating Extraction Yield with Atago 1. Weigh everything. Record your dry dose (g) and the brewed liquid you produced (g). A reliable coffee scale is non-negotiable. 2. Let it cool slightly. Very hot liquid can skew the reading. A couple of minutes, or a single cooler drop, is enough. Using a barista-grade thermometer can be very useful in this process. 3. Calibrate and measure. Zero with distilled water, then spread 2–3 drops of coffee evenly across the prism. 4. Read the TDS. For the sake of this example, we will be using 1.35%. 5. Run the formula. EY = (1.35 × 200g) ÷ 15g = 18.0% — you're at SCA's lower boundary. A finer grind or longer brew time will push you toward 20%. How to Use These Numbers in Practice Different brewing methods naturally produce different concentrations, so TDS should always be read in context. The table below gives you a practical reference point for several common brew methods, showing the typical TDS range, extraction yield and brew ratio for each. Make sure to use these numbers as a starting point rather than a strict rule. If your coffee tastes unbalanced, they can help you identify which part of the recipe may need adjusting. Brew Method Target TDS (%) Target EY (%) Typical Ratio Filter / Pour Over 1.15 – 1.45 18 – 22 1:15 – 1:17 Espresso 8 – 12 18 – 22 1:2 – 1:2.5 French Press 1.2 – 1.5 18 – 22 1:14 – 1:16 Cold Brew (concentrate) 1.3 – 1.7 18 – 22 1:8 – 1:10 What Sets Atago Apart? Most refractometers are calibrated for sugar solutions, not coffee. Atago's coffee-specific models — the PAL-COFFEE BX/TDS and PAL-COFFEE TDS — are adjusted for coffee's actual optical properties. Built-in Automatic Temperature Compensation (ATC) means you don't need to wait for your sample to fully cool. One drop is enough, it's easy to clean, and it fits in a pocket. Beyond convenience, the readings are consistent. If you hit 20% today with a given recipe, the same parameters should give you the same result tomorrow. In a professional setting that matters for quality control. At home it accelerates learning; you stop guessing and start adjusting. Good Coffee Is About Understanding Your Brew A refractometer gives you something taste alone cannot: a number you can compare from one cup to the next. But extraction yield is about more than just chasing a perfect percentage; it is about understanding why a coffee tastes the way it does, and knowing what to change when it does not taste quite right. Grind size, water temperature, brew time, coffee-to-water ratio and the coffee itself all affect your final cup. Tools such as the Atago refractometer simply make those relationships easier to see. Whether you measure every brew or rely mostly on taste, learning the principles behind extraction gives you more control, and makes it much easier to recreate the cups you actually enjoy. Ready to experiment with your own brew? Explore our coffee beans and brewing equipment, or visit The Unusual Space and let our baristas make you a cup.
Pumpkin Spice Latte Recipe: Barista-Style Café Quality at Home
Sep 14, 2026 · Tolga SeçkinA great pumpkin spice latte is more than just a trendy coffee drink. When made properly, it combines the flavours of rich espresso, creamy steamed milk, pumpkin, and warm spices in one delicious drink. The secret to a café-quality homemade pumpkin spice latte isn't just adding more sugar or an extra dash of cinnamon. It's about getting the ratios, milk texture, espresso strength, and spice balance right. In this recipe article, we'll show you how to make a barista-style pumpkin spice latte at home, using professional techniques that can make a big difference even with basic home equipment. In this article, you'll learn: How a pumpkin spice latte is balanced How to make your own pumpkin spice blend The ideal espresso-to-milk ratio How to create smooth microfoam at home How to balance sweetness, pumpkin, and spices How to make both hot and iced pumpkin spice lattes What Is a Pumpkin Spice Latte? A pumpkin spice latte, often called a PSL in pop culture, is an autumnal cosy coffee beverage made with espresso, milk, pumpkin, sweetener, and a blend of warming spices. Although pumpkin gives the drink its name, the iconic flavour mainly comes from the spice blend. Cinnamon, ginger, nutmeg, and cloves create the warm flavour profile that pumpkin spice is known and loved for. In a well-balanced pumpkin spice latte, pumpkin should not overpower the coffee or spices. Instead, it adds texture and a subtle earthy sweetness. The goal is to create a drink where espresso, milk, pumpkin, and spices work together in harmony rather than trying to over-power one another. Pumpkin Spice Latte Ingredients and Ratios From a barista's perspective, a pumpkin spice latte can be broken down into three main components: the spice blend, the milk base, and the espresso. Getting the balance between these components right is what separates a good homemade PSL from a sweet cinnamon latte. 1. Homemade Pumpkin Spice Blend To create the spice blend, combine: 2 teaspoons ground cinnamon 1 teaspoon ground ginger 1/2 teaspoon ground nutmeg 1/4 teaspoon ground cloves Mix the spices together and make sure to store them in an airtight container. This barista-tested ratio creates a pumpkin spice flavour without one overly dominant spice flavour. Cloves can be particularly powerful in taste. Using too much can make the drink taste sharp, bitter, or medicinal, so a small amount is enough. 2. Milk Base For approximately two servings: 2 cups whole milk 2–3 tablespoons pumpkin purée 2–3 tablespoons brown sugar 1 teaspoon homemade pumpkin spice blend Whole milk is the best choice for the richest texture and a more stable microfoam. If you prefer a plant-based alternative, barista-style oat milk is a great option because of its creamy texture and good performance in terms of steaming. 3. Espresso 2 shots of espresso Ristretto can be used for a more concentrated and intense coffee flavour If you don't have an espresso machine, a moka pot is one of the better alternatives. You can also use strongly brewed coffee, although keep in mind that the flavour and texture will not be exactly the same as espresso. How To Make a Pumpkin Spice Latte: Step-by-Step 1. Toast the Spices Combine the cinnamon, ginger, nutmeg, and cloves. To maximise the aroma, briefly dry-toast the spice blend in a saucepan over low heat before adding the milk. Keep the spices moving and heat them only for a few seconds. The goal is to release their aromatic oils, not to brown or burn them. Therefore, the moment your apartment starts smelling like a cosy fall afternoon, add your milk immediately. This small step is often overlooked in home recipes, but it truly boosts the aroma of the finished product. 2. Prepare the Pumpkin Milk Base Add the whole milk, pumpkin purée, brown sugar, and pumpkin spice blend to a saucepan. Heat gently over medium-low heat for around 4–5 minutes. Do not bring the milk to a boil, as overheating the milk can change its flavour and texture. The goal is to gently heat the mixture and allow the pumpkin and spices to integrate into the milk, not to make pumpkin soup. For the best results, aim for approximately 60–65°C (140–149°F) when heating. 3. Create Smooth Microfoam Transfer the warm milk mixture to a milk frother or use a French press to aerate it for approximately 20–30 seconds. The goal is a fine and glossy microfoam, not large, dry bubbles. Good microfoam should look smooth and shiny, with a texture comparable to wet paint. This ensures the creamy mouthfeel everyone enjoys when having a well-made latte. If you're using a steam wand, incorporate the air gently during the first few seconds and then continue heating while creating a smooth whirlpool in the center. 4. Pull the Espresso Prepare two shots of espresso and pour them into your serving glass. For a stronger coffee flavour, a ristretto works great too. Its concentrated flavour makes the espresso more noticeable, so adjust based on your preference. 5. Combine the Espresso and Milk Slowly pour the mixture over the espresso. Pouring steadily helps integrate the coffee and milk while preserving the creamy texture of the microfoam. If you're using a larger latte glass, aim for an overall espresso-to-milk ratio of approximately 1:3 to 1:4. This keeps the espresso flavour intact without the spices or sweetness becoming too overpowering. 6. Finish Your Pumpkin Spice Latte Top your PSL with a light dusting of ground cinnamon or pumpkin spice. Whipped cream is completely optional. If you add whipped cream, consider reducing the amount of brown sugar slightly, unless you prefer your drink on the sweeter side. Barista Tips For a Better Pumpkin Spice Latte Keep the Espresso-to-Milk Ratio Balanced A traditional PSL generally has an espresso-to-milk ratio of around 1:3 to 1:4. Because a pumpkin spice latte contains additional ingredients such as pumpkin, sugar, and spices, keeping the coffee relatively concentrated helps prevent the espresso from disappearing beneath the other flavours. Add Sweetener Gradually Pumpkin purée and spices affect the perception of sweetness. Rather than adding the full amount of sugar immediately, start with slightly less and adjust after tasting. This gives you much more control over the final flavour. Use Fresh Spices Freshly ground or recently opened spices can make a big difference. Ground spices gradually lose their aroma over time, so if your cinnamon has been sitting in the cupboard for years, your pumpkin spice latte may taste more dull. Don't Overheat the Milk Milk that is overheated can develop a cooked flavour and lose some of the sweetness and texture that make a latte enjoyable. For a hot latte, keeping the milk around 60–65°C (140–149°F) is a good target. Make the Iced Version Differently For an iced pumpkin spice latte, prepare the pumpkin milk mixture first and let it cool. Pour it over ice and add espresso. Avoid pouring very hot, foamed milk directly over ice because the rapid temperature change can make the milk foam collapse and separate. The Bottom Line Making a café-quality pumpkin spice latte at home doesn't require complicated equipment. The biggest difference comes from technique: balance the spice blend, gently heat the base, create fine microfoam, and use a good-quality espresso. Once you understand the ratios, you can easily adjust the sweetness, spice intensity, milk choice, and espresso strength to create your own perfect homemade PSL. The result should be creamy, aromatic, and balanced; not just sweet. That's the difference between a pumpkin spice latte that tastes homemade and one that tastes barista-made. Frequently Asked Questions Does a Pumpkin Spice Latte Actually Contain Pumpkin? Yes. A traditional pumpkin spice latte can contain real pumpkin purée, although the pumpkin itself is not usually the dominant flavour. Its main role is to add body, texture, and a subtle earthy sweetness. The characteristic flavour of the drink comes primarily from the pumpkin spice blend. Can I Use Homemade Pumpkin Purée? Absolutely. Roast or steam pumpkin until tender, then blend it until completely smooth. For a particularly smooth latte, strain the purée if necessary to remove any remaining fibers. Can I Make a Pumpkin Spice Latte Without an Espresso Machine? Yes. A moka pot is one of the best alternatives for creating a strong coffee base at home. You can also use strongly brewed coffee, although it will not have the same concentration and crema as espresso. For more home coffee equipment and brewing options, explore our barista equipment collection. Can I Make a Pumpkin Spice Latte With Oat Milk? Yes. Barista-style oat milk is one of the best plant-based options for a homemade pumpkin spice latte. Its creamy texture and ability to create stable foam make it particularly suitable for latte-style drinks. What Is the Best Espresso for a Pumpkin Spice Latte? Choose an espresso that can hold its own against milk, sugar, pumpkin, and spices. Medium to medium-dark roasted coffees with chocolate, caramel, nutty, or spice notes tend to work particularly well. Very delicate, highly floral coffees can sometimes disappear beneath the stronger flavours of a pumpkin spice latte.
The Origins of Coffee Beans: Single-Origin vs. Blends
Aug 21, 2026 · Tolga SeçkinNowadays, it is remarkably easy to search for a variety of coffee tastes and find them quickly. Thanks to the globalization of the world, there is a variety of different labels you can find on coffee bags. We hear a lot of customers ask this central question: "Does Single Origin or Blend coffee truly taste better?" Most of our customers wonder what the exact difference is between these two types of coffee. How do you choose between coffee beans? Here is the answer to these questions:
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