03Whisk milk, eggs, and vanilla until combined. Add the brown butter and stir to combine.
04Whisk together flour, sugar, baking powder and salt in a medium bowl. Add milk and butter mixture all at once and stir gently to combine. Gently but thoroughly fold in the berries. Don’t over mix.
05Divide the batter among muffin cups and spread evenly.
06To make the topping, combine all of the ingredients in a bowl and rub together with your fingertips until crumbly. Sprinkle evenly over the batter in the cups.
07Bake until golden and crisp and a wooden pick inserted into the center of a muffin comes out clean, about 18-20 minutes. Cool in pan on a rack for 15 minutes then remove from the pan. Serve warm or at room temperature.