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These Blueberry Oat Crumble Muffins combine tender, fruit-filled muffin centers with a buttery, cinnamon-scented crumble topping for a satisfying contrast in every bite.
Rolled oats give the muffins a hearty texture, while all-purpose flour keeps the crumb light enough to remain soft and tender.
Fresh blueberries are folded through the batter, creating bursts of juicy fruit throughout the muffins as they bake.
A blend of brown sugar, cinnamon, butter, and oats forms the topping, adding a sweet, lightly crisp finish that complements the soft muffin beneath it.
The batter also includes vanilla almond milk, melted coconut oil, softened butter, eggs, and vanilla extract, creating a rich and fragrant base.
Brown sugar brings gentle caramel-like sweetness, while cinnamon adds warmth without overpowering the blueberries.
The combination of rolled oats and two types of vanilla protein powder gives these muffins their distinctive ingredient profile.
The baking method is especially useful for achieving a nicely developed top: the muffins begin in a hot oven before the temperature is reduced to finish baking.
This helps produce lightly browned tops while keeping the centers tender.
With their juicy blueberries, cozy cinnamon flavor, and generous buttery crumble, these muffins work beautifully as a breakfast treat, snack, or simple dessert.
Blueberry Oat Crumble Muffins
Ingredients
Equipment
Method
- Preheat the Oven: Preheat the oven to 425°F.
- Prepare the Crumb Topping: Combine the brown sugar, cold butter, flour, rolled oats, and cinnamon in a medium bowl. Use your fingers or a fork to cut the cold butter into the dry ingredients until the mixture forms large, coarse crumbles. Work patiently and avoid over-mixing. Set the topping aside.
- Soak the Oats: Pour the unsweetened vanilla almond milk over the rolled oats and set the mixture aside.
- Combine the Dry Ingredients: In a separate bowl, mix the all-purpose flour, vanilla casein protein powder, vanilla whey protein powder, cinnamon, baking powder, baking soda, and salt until evenly combined.
- Cream the Butter and Sugar: Using a handheld or stand mixer fitted with a paddle attachment, beat the softened butter and light brown sugar on high speed for about 2 minutes, until the mixture is smooth and creamy.
- Add the Eggs: Add the room-temperature eggs one at a time, beating after each addition until well combined.
- Incorporate the Coconut Oil: Reduce the mixer speed to low and slowly add the melted coconut oil, mixing until it is thoroughly incorporated.
- Combine the Batter: Add the wet ingredients to the dry mixture and mix only until the ingredients are just combined.
- Fold in the Blueberries: Gently fold the blueberries into the batter, taking care not to overmix.
- Fill the Muffin Cups: Divide the batter evenly among 14 non-stick baking cups.
- Add the Crumble: Divide the prepared crumb topping over the muffins, using a spoon or your fingers, then gently press the crumbles into the tops so they adhere to the batter.
- Begin Baking: Place the muffins in the 425°F oven and bake for 5 minutes.
- Reduce the Oven Temperature: After 5 minutes, lower the oven temperature to 350°F and continue baking for about 20 minutes.
- Check for Doneness: Bake until the muffin tops begin to brown slightly and a toothpick inserted into the center of a muffin comes out clean.
Notes
- Use room-temperature eggs as specified so they incorporate smoothly into the creamed butter and sugar.
- The coconut oil should be melted before adding it to the batter.
- Keep the crumb topping in large, coarse pieces rather than mixing it into a fine, uniform mixture.
- Avoid over-mixing the crumb topping so the finished muffins retain a distinct streusel texture.
- Mix the muffin batter only until the ingredients are combined, then gently fold in the blueberries.
- The recipe source states 14 servings, but one instruction refers to 16 muffins when distributing the topping. Since the stated yield is 14, divide the crumble evenly among the 14 filled muffin cups.
- Begin baking at 425°F, then reduce the temperature to 350°F after 5 minutes.
- The muffins are ready when the tops are slightly browned and a toothpick inserted into the center comes out clean.
Chef’s Secret
The most important texture tip for these muffins is to keep both the batter and crumble topping from being overworked.
Once the wet and dry muffin ingredients come together, mix only until no obvious dry mixture remains, then fold in the blueberries gently.
For the topping, use cold butter and work it into the flour, oats, brown sugar, and cinnamon with your fingers or a fork until large crumbles form.
Resist the urge to make the mixture uniform or smooth. Those larger pieces create the buttery, textured topping that makes these muffins distinctive.
Following the two-temperature baking method also helps develop lightly browned tops while the centers finish baking.
Serving Suggestions
Serve the muffins warm or at room temperature for breakfast, a snack, or dessert. They pair naturally with fresh blueberries, a bowl of yogurt, or a simple serving of fruit.
For an extra finishing touch, add a light dusting of cinnamon or a small spoonful of yogurt alongside the muffin.
They can also be served as part of a breakfast spread with coffee, tea, or a glass of milk.
Conclusion
These Blueberry Oat Crumble Muffins bring together juicy blueberries, hearty rolled oats, warm cinnamon, and a buttery brown-sugar crumble in one tender bake.
The contrasting textures make them especially enjoyable, while the straightforward preparation keeps them practical for breakfast, snacking, or dessert.
