Vanilla Protein Powder Muffins (Vegan)

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These vanilla protein powder muffins are soft, fluffy, lightly sweet, and so easy to make. They’re a great option when you want something snacky and satisfying, but still made with simple, wholesome ingredients.

I make these when I want something quick that I can keep in the fridge and grab throughout the day. You can keep them plain or add poppy seeds, lemon zest, or anything else you feel like.

Why I love this muffin recipe

You blend the oats, mix everything in one bowl, and bake. No special equipment, no complicated steps. It’s easy to adjust based on what you have, and it still works. The muffins come out soft with a slightly dense center (in a good way!).

The vanilla flavor is subtle, and the sweetness is just enough without feeling heavy. They hold up well in the fridge, which makes them useful to have on hand. Here are a few more reasons why I love this recipe:

• Simple ingredients
• One-bowl recipe
• Soft texture
• Not overly sweet
• Easy to adjust
• Good for batch prep

Ingredients for Vanilla Protein Powder Muffins

Oats: Blended into oat flour to create the base. Use gluten-free oats if needed.

Vanilla protein powder: Adds flavor and makes the muffins more filling. Use one you like the taste of, since it comes through. You can find a selection of my favorite vegan & plastic-free protein powders here.

Coconut sugar: A less refined alternative to regular sugar. It contains small amounts of inulin (a type of soluble fiber), which may help reduce blood sugar spikes after eating. It also has some minerals and antioxidants, and a slightly lower glycemic index. You can swap it with brown sugar if needed.

Baking soda: Helps the muffins rise.

Salt: Balances the flavor.

Plant-based milk: I used oat milk, but any plant milk works.

Lemon juice: Helps activate the baking soda and improves the texture.

Coconut oil: Adds moisture. Any neutral oil works here.

Poppy seeds: Optional, but they add texture.

How to make the Vanilla Protein Powder Muffins

Step 1: Blend the oats.

Blend the oats into a flour-like texture.

Step 2: Mix the dry ingredients.

Add oat flour, protein powder, coconut sugar, baking soda, and salt to a bowl. Mix well.

Step 3: Add the wet ingredients.

Pour in the plant milk, lemon juice, and coconut oil. Mix until combined. Stir in poppy seeds if using.

Step 4: Fill the muffin tray.

Spoon the batter into a lined or greased tray. Fill about ¾ full, or more if you want bigger muffins.

Step 5: Bake.

Bake at 180°C for 20–21 minutes, until set.

Step 6: Let them cool.

Let them cool before removing from the tray.

Tips & recipe adaptations

• Blend the oats properly: Blend until you get a fine, flour-like texture. If it’s too coarse, the muffins turn out more crumbly and don’t hold together as well.
• Protein powder matters more than you think: Different brands absorb liquid differently. If your batter feels too thick, add a splash of plant milk. If it’s too runny, let it sit for a minute so the oats can absorb.
• Adjust the batter if needed: The batter should be thick but scoopable. If it’s dry or stiff, add a bit more milk. If it’s too loose, add a spoonful of oat flour.
• Don’t skip the lemon juice: It reacts with the baking soda and helps the muffins rise. Without it, they’ll be flatter and denser.
• Leftovers and storage: Store in an airtight container in the fridge for up to 4 days. For longer storage, freeze once fully cooled in a sealed container or bag. If stacking, add parchment between layers so they don’t stick. Defrost at room temperature or warm for ~20–30 seconds.