Easy Lemon Blackberry Muffins with an Oat Streusel Topping.
A soft and moist muffin filled with blackberries and topped with an oat streusel. It tastes like a blackberry crisp, but in the form of a delicious muffin!
Preheat oven to 400 degrees F. Combine the flour, baking soda, baking powder, and salt together in a medium bowl. Mix and set aside.
In a large mixing bowl, add the eggs, oil, Greek yogurt, buttermilk, sugar, and vanilla extract. Whisk together until smooth. Stir in the dry ingredients and mix until just combined. Fold in the blackberries.
To make the oat streusel topping, combine the brown sugar, flour, brown sugar, rolled oats and pinch of salt. Add the melted butter and stir until combined.
Divide the muffin batter into 12 muffin tins with muffin liners. Evenly top each muffin with the oat Streusel. Bake for 5 minutes at 400 degrees, then reduce heat to 350 degrees for 13-15 minutes more or until the batter is set. Let cool and enjoy!