Moist, buttery Blueberry Muffins with Streusel Topping are topped with soft vanilla crumble for a delectable breakfast side or on-the-go snack. These homemade muffins baked with fresh blueberries are guaranteed to taste heavenly with each sweet bite!
Preheat oven to 400 degrees F. In a small bowl, combine melted butter, flour, sugar, salt, and vanilla extract. Spoon together until little crumbles form and place in the freezer.
Combine melted butter, sugar, brown sugar, and vanilla extract. Whisk together until combined. Then add eggs, Greek yogurt, and buttermilk. Continue to whisk together until smooth.
Add flour, baking powder, and kosher salt. Fold with a flat spatula or spoon. Add blueberries and continue to fold together until a smooth batter forms.
Spray a 12-cup muffin pan with nonstick baking spray. Place baking cups in every other cup and fill to the top with batter. Sprinkle crumb topping on top. Bake for 21-23 minutes, until a toothpick comes out clean.