Protein Brownies
The single biggest risk with a protein brownie is dryness, and the fix is a genuinely wet base — black beans, yogurt or nut butter — combined with pulling the tray out of the oven before it looks fully set. Get that right and a protein brownie can be just as fudgy as a conventional one.
Why protein brownies dry out
Cocoa powder and protein powder are both relatively dry, absorbent ingredients, so a recipe that leans heavily on both without enough fat or moisture elsewhere quickly turns cakey or crumbly rather than dense and fudgy. Conventional brownies rely on a high ratio of butter and sugar to flour for their fudginess; a protein version needs an equivalent source of moisture to replace some of that.
Black beans are a genuinely useful trick here: blended smooth, they disappear completely in flavour once there's enough cocoa and salt in the mix, but they bring both moisture and their own protein and fibre to the batter.
A fudgy recipe
Blend a drained 400g tin of black beans with two eggs, 80g of peanut or almond butter, 60g cocoa powder, 60g chocolate protein powder, 80g maple syrup, a teaspoon of baking powder and a good pinch of salt until completely smooth — a food processor works better than a hand blender for a really even batter.
Bake at 170C for 20 to 22 minutes in a lined 20cm square tin. The middle should still wobble slightly when you take it out; it will continue to set as it cools. Cool completely in the tin before cutting — this resting step is what makes them fudgy rather than cakey, since a warm brownie is always structurally softer than a cooled one.
For an even richer result, stir a handful of dark chocolate chunks through the batter before baking, or melt a little extra dark chocolate into the mix in place of some of the cocoa powder.
Shop-bought versions
Packaged protein brownies typically carry 10g to 20g of protein for 200 to 250 calories, which works out at roughly 6g to 8g per 100 calories — respectable for a baked treat but well behind a shake or a pot of yogurt, which can reach 10g to 20g per 100 calories.
Many rely on sugar alcohols such as erythritol or maltitol, plus added fibre, to keep sugar and calories down while maintaining a fudgy texture. Eaten in quantity, sugar alcohols can cause bloating or a laxative effect in some people, so it's worth checking the ingredients list if you eat these regularly.
Who this suits and storage
Homemade black bean brownies suit anyone who wants a genuinely nutrient-dense treat with fibre and protein rather than a highly processed alternative, and the recipe is naturally gluten free since there's no flour in it. They're less convenient than a shop-bought bar if you need something to carry around all day without refrigeration, since the moist batter means they don't keep quite as long unrefrigerated.
Store in an airtight container in the fridge for up to five days, or freeze individual squares for up to three months and defrost as needed.
Nutrition information on this page is for general information only and is not medical or dietary advice.
Frequently asked questions
- Can you taste the black beans in protein brownies?
- No, provided the batter is blended completely smooth and there is enough cocoa powder and salt to carry the flavour. Any graininess usually means under-blending rather than the beans themselves being detectable.
- Why are my protein brownies dry?
- Almost always overbaking, or too much protein powder relative to the wet ingredients. Pull them out while the centre still wobbles slightly, since they continue to cook as they cool.
- How much protein is in a protein brownie?
- A homemade black bean and protein powder batch typically gives 6g to 8g per square, while shop-bought protein brownies usually carry 10g to 20g per bar depending on size and brand.
- Can I make protein brownies without eggs?
- A flax egg (one tablespoon ground flaxseed mixed with three tablespoons water, rested for five minutes) works as a substitute, though the brownies will be slightly denser and less structured.
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