Best Strawberry Rhubarb Protein Muffins

Finding a muffin recipe that’s both satisfying and packed with protein can feel like searching for a needle in a haystack. Most protein muffins end up dry and chalky, or they’re loaded with so much sugar that they might as well be cupcakes. And if you’re trying to sneak some fruit and veggies into your family’s breakfast routine, the struggle gets even more real.

These strawberry rhubarb protein muffins are exactly what you need: they’re moist and flavorful thanks to Greek yogurt and avocado oil, they deliver a solid protein boost without that weird powdery taste, and the combo of sweet strawberries and tart rhubarb makes them taste like springtime in every bite.

SAVE NOW

What Kind of Rhubarb Should I Use?

Fresh rhubarb is always your best bet for these muffins, and you’ll find it in grocery stores during spring and early summer when it’s in season. The color of the stalks – whether they’re bright red or more greenish – doesn’t really affect the flavor, so grab whichever looks freshest with firm, crisp stalks. If fresh rhubarb isn’t available, frozen rhubarb works just fine too, though you’ll want to thaw it first and pat it dry with paper towels to remove excess moisture. Just make sure to chop your rhubarb into small, bite-sized pieces (about half-inch chunks) so they distribute evenly throughout the muffins and bake properly.

SAVE NOW

Options for Substitutions

These muffins are pretty adaptable, so here are some swaps you can make based on what you have:

• Protein powder: If you don’t have protein powder, you can replace it with an equal amount of flour. Your muffins will be just as tasty, though they’ll have less protein per serving.
• Greek yogurt: Regular yogurt, sour cream, or even mashed banana (about 1 cup) work well here. If using banana, you might want to reduce the sugar slightly since it adds extra sweetness.
• Coconut sugar: Brown sugar, white sugar, or honey (use about ½ cup) are all fine substitutes. The flavor will be slightly different, but the muffins will still turn out great.
• Avocado oil: Swap it with melted coconut oil, vegetable oil, or melted butter in the same amount. Each will give you moist muffins.
• Rhubarb: If rhubarb isn’t in season, use extra strawberries or try raspberries or blueberries instead. You can also use frozen rhubarb – just don’t thaw it before adding to the batter.
• Milk: Any milk works here – almond milk, oat milk, or regular dairy milk are all interchangeable in this recipe.

Watch Out for These Mistakes While Baking

The biggest mistake with protein muffins is overmixing the batter, which activates the gluten in the flour and creates tough, dense muffins instead of light and fluffy ones – stir just until the dry ingredients are barely combined with the wet ingredients, even if you see a few lumps.

Since protein powder absorbs more liquid than regular flour, your batter might look thicker than traditional muffin batter, but resist the urge to add extra milk or you’ll end up with gummy muffins that won’t rise properly.

Don’t skip the step of tossing your strawberries and rhubarb in that extra flour, as it prevents the fruit from releasing too much moisture and sinking straight to the bottom of your muffins.

Finally, start checking for doneness at 18 minutes with a toothpick – protein powder can cause muffins to dry out quickly, so pulling them when the toothpick comes out with just a few moist crumbs will give you the best texture.

SAVE NOW

What to Serve With Strawberry Rhubarb Protein Muffins?

These muffins are perfect for breakfast or as a post-workout snack, and they pair really well with a hot cup of coffee or your favorite tea. I love having them alongside a smoothie bowl or some scrambled eggs for a complete breakfast that keeps me full until lunch. They’re also great with a smear of almond butter or cream cheese if you want something a bit more filling. Since they already have protein powder in them, you can keep things simple and just enjoy them on their own with a glass of cold milk or your go-to protein shake.

Storage Instructions

Store: Keep your muffins in an airtight container at room temperature for up to 3 days, or in the fridge for about a week. I like to grab one for breakfast throughout the week, and they taste great cold or at room temperature with a little butter spread on top.

Freeze: These muffins are perfect for freezing! Let them cool completely, then wrap each one individually in plastic wrap and store them in a freezer bag for up to 3 months. I always keep a stash in my freezer for busy mornings when I need a quick breakfast.

Thaw: Just leave a frozen muffin on the counter for about 30 minutes to thaw, or pop it in the microwave for 20-30 seconds. You can also warm them in the oven at 300°F for about 10 minutes if you want that fresh-baked feeling again.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 1350-1500
• Protein: 42-48 g
• Fat: 38-45 g
• Carbohydrates: 210-230 g

Ingredients

For the dry mix:

• 1.33 cups flour (I always use King Arthur all-purpose flour)
• 0.5 cup protein powder
• 2.25 tsp baking powder
• 0.5 tsp baking soda
• 0.25 tsp salt
• 0.25 tsp ground cinnamon

For the wet mix:

• 0.75 cup Greek yogurt (I prefer Fage 5% for better moisture and texture)
• 0.75 cup coconut sugar
• 0.33 cup avocado oil
• 0.25 cup milk
• 2 eggs (room temperature, about 70°F)
• 2 tsp vanilla essence

For the fruit fold:

• 0.75 cup strawberries (diced into 1/2-inch pieces)
• 0.75 cup rhubarb (sliced into 1/4-inch thick rounds)

Step 1: Prepare Mise en Place and Preheat Oven

• 0.75 cup strawberries
• 0.75 cup rhubarb

Preheat your oven to 375°F and line a standard 12-cup muffin tin with paper liners or grease it well.

While the oven heats, dice the strawberries into 1/2-inch pieces and slice the rhubarb into 1/4-inch thick rounds.

Set these fruits aside on a plate.

Having everything prepped before you start mixing ensures the batter doesn’t sit too long and lose its rise.

Step 2: Combine All Dry Ingredients

• 1.33 cups flour
• 0.5 cup protein powder
• 2.25 tsp baking powder
• 0.5 tsp baking soda
• 0.25 tsp salt
• 0.25 tsp ground cinnamon

In a large mixing bowl, whisk together the flour, protein powder, baking powder, baking soda, salt, and cinnamon.

Mix thoroughly to distribute the leavening agents and cinnamon evenly—this prevents lumps and ensures consistent rise and flavor throughout all the muffins.

Step 3: Whisk Together Wet Ingredients

• 0.75 cup Greek yogurt
• 0.75 cup coconut sugar
• 0.33 cup avocado oil
• 0.25 cup milk
• 2 eggs
• 2 tsp vanilla essence

In a separate bowl, whisk together the Greek yogurt, coconut sugar, avocado oil, milk, room-temperature eggs, and vanilla essence until smooth and well combined.

The room-temperature eggs are important here—they incorporate more smoothly into the batter and create a more tender crumb.

I like to use Fage 5% yogurt specifically because its higher fat content keeps these muffins moist even after a day or two.

Step 4: Combine Wet and Dry Ingredients

• dry ingredient mixture from Step 2
• wet ingredient mixture from Step 3

Pour the wet ingredient mixture from Step 3 into the dry ingredient mixture from Step 2.

Gently fold together with a spatula or wooden spoon just until the ingredients are combined—do not overmix.

A few small lumps in the batter are fine; overmixing develops gluten and creates dense, tough muffins instead of the tender crumb you want.

Step 5: Fold in Fruits with Flour Coating

• 0.75 cup strawberries
• 0.75 cup rhubarb
• 0.25 cup flour

In a small bowl, toss the prepared strawberries and rhubarb with the remaining 1/4 cup flour—this prevents them from sinking to the bottom of the muffins during baking.

Gently fold the floured fruit into the batter from Step 4 until just combined.

The fruit coating keeps the pieces evenly distributed throughout and prevents the filling from creating a soggy bottom layer.

Step 6: Fill Tin and Bake

• batter from Step 5

Divide the batter evenly among the muffin cups, filling each about two-thirds full.

Bake in the preheated 375°F oven for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean or with just a few moist crumbs.

The tops should be lightly golden and spring back when gently pressed.

Step 7: Cool and Serve

Remove the muffin tin from the oven and let the muffins cool in the tin for about 5 minutes before turning them out onto a wire rack to cool completely.

This brief resting period allows them to set just enough to remove cleanly without breaking.

Serve warm or at room temperature.

Best Strawberry Rhubarb Protein Muffins

Delicious Best Strawberry Rhubarb Protein Muffins recipe with step-by-step instructions.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 25 minutes mins

Total Time 42 minutes mins

Servings 12 muffins

Calories 1425 kcal

Ingredients

  

For the dry mix::

• 1.33 cups flour (I always use King Arthur all-purpose flour)
• 0.5 cup protein powder
• 2.25 tsp baking powder
• 0.5 tsp baking soda
• 0.25 tsp salt
• 0.25 tsp ground cinnamon

For the wet mix::

• 0.75 cup Greek yogurt (I prefer Fage 5% for better moisture and texture)
• 0.75 cup coconut sugar
• 0.33 cup avocado oil
• 0.25 cup milk
• 2 eggs (room temperature, about 70°F)
• 2 tsp vanilla essence

For the fruit fold::

• 0.75 cup strawberries (diced into 1/2-inch pieces)
• 0.75 cup rhubarb (sliced into 1/4-inch thick rounds)

Instructions

 

• Preheat your oven to 375°F and line a standard 12-cup muffin tin with paper liners or grease it well. While the oven heats, dice the strawberries into 1/2-inch pieces and slice the rhubarb into 1/4-inch thick rounds. Set these fruits aside on a plate. Having everything prepped before you start mixing ensures the batter doesn't sit too long and lose its rise.
• In a large mixing bowl, whisk together the flour, protein powder, baking powder, baking soda, salt, and cinnamon. Mix thoroughly to distribute the leavening agents and cinnamon evenly—this prevents lumps and ensures consistent rise and flavor throughout all the muffins.
• In a separate bowl, whisk together the Greek yogurt, coconut sugar, avocado oil, milk, room-temperature eggs, and vanilla essence until smooth and well combined. The room-temperature eggs are important here—they incorporate more smoothly into the batter and create a more tender crumb. I like to use Fage 5% yogurt specifically because its higher fat content keeps these muffins moist even after a day or two.
• Pour the wet ingredient mixture from Step 3 into the dry ingredient mixture from Step 2. Gently fold together with a spatula or wooden spoon just until the ingredients are combined—do not overmix. A few small lumps in the batter are fine; overmixing develops gluten and creates dense, tough muffins instead of the tender crumb you want.
• In a small bowl, toss the prepared strawberries and rhubarb with the remaining 1/4 cup flour—this prevents them from sinking to the bottom of the muffins during baking. Gently fold the floured fruit into the batter from Step 4 until just combined. The fruit coating keeps the pieces evenly distributed throughout and prevents the filling from creating a soggy bottom layer.
• Divide the batter evenly among the muffin cups, filling each about two-thirds full. Bake in the preheated 375°F oven for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean or with just a few moist crumbs. The tops should be lightly golden and spring back when gently pressed.
• Remove the muffin tin from the oven and let the muffins cool in the tin for about 5 minutes before turning them out onto a wire rack to cool completely. This brief resting period allows them to set just enough to remove cleanly without breaking. Serve warm or at room temperature.