Two-Ingredient Chocolate Protein Cosmic Muffins

When I first shared these cosmic muffins, the internet went wild - and for good reason. Sometimes the best recipes are the simplest ones, and these two-ingredient protein muffins prove exactly that. With just whipped egg whites and your favorite protein powder, you can create fluffy, cloud-like muffins that deliver serious protein without the guilt.

What makes these truly special is how light and airy they are. By whipping the egg whites to stiff peaks and gently folding in protein powder, you're essentially creating a protein-packed meringue that bakes into the most satisfying little treats. At only 50 calories per muffin, you can enjoy all five and still come in under 250 calories total. Life is all about balance, which is why I add a few dark chocolate M&Ms halfway through baking - because sometimes you need a little something extra.

I developed this recipe for those moments when you want something sweet but don't want to spend hours in the kitchen or derail your nutrition goals. They're perfect for meal prep, post-workout snacks, or when you want something sweet but don't want to feel guilty about it. These are vegetarian, naturally gluten-free, and take just 15 minutes from start to finish. I've made batch after batch of these, and they never get old. The texture is unlike anything else - not quite a traditional muffin, more like eating a cloud of protein-packed goodness. You can experiment with different protein powder flavors too. I typically use plant-based chocolate, but vanilla, strawberry, or even peanut butter protein powder all work beautifully.

The magic of this recipe is in its simplicity. Egg whites are pure protein with virtually no fat or carbohydrates, making them ideal for high-protein, low-calorie baking. When whipped to stiff peaks, they create an airy, cloud-like texture that's absolutely heavenly. You'll need 200 grams of egg whites, which you can buy pre-separated in cartons at most grocery stores for convenience. I used to separate eggs myself, but buying the cartons saves so much time and mess.

The protein powder adds both flavor and a serious protein boost while keeping the recipe vegetarian-friendly. I use Momentous plant-based chocolate protein powder because I love the flavor and it mixes beautifully into the egg whites, but any protein powder you love will work - whey, casein, or plant-based all create delicious results. I've tested this with at least a dozen different brands and flavors. Try vanilla, strawberry, or peanut butter flavored protein for variety. Each creates a completely different flavor profile.

The dark chocolate M&Ms are completely optional but highly recommended. They provide a small indulgence and hit of chocolate that makes these feel like a real dessert rather than just a protein snack. If you want to keep them even healthier, swap for sugar-free chocolate chips. I've also done mini chocolate chips, cacao nibs, and even fresh berries pressed into the tops.

The technique for these muffins is straightforward but requires a gentle touch. You'll start by preheating your oven and preparing your muffin tin - I always use liners for easy cleanup, though a good non-stick pan works too.

The key step is whipping those egg whites properly. Add them to a completely clean, grease-free bowl (any oil or fat will prevent them from whipping), then use a hand mixer or stand mixer on high speed. You're looking for stiff peaks that stand straight up when you lift the beaters - this usually takes me about 3-5 minutes. Don't rush this step; properly whipped whites are what give these their signature texture.

Once you have those beautiful peaks, gently fold in your protein powder using a rubber spatula. Use a folding motion from the bottom up and over, being careful not to deflate all that air you just incorporated. The mixture should stay light and fluffy. Divide among your muffin cups and bake for just 5 minutes, then add your chocolate if using, and bake another 5 minutes. The short baking time keeps them moist inside while setting the structure. I've found that overbaking makes them dry and dense, so watch them carefully.