Exploding with juicy blackberries, tons of lemon poppyseed flavor and covered in a tangy lemon glaze, these lemon poppyseed blackberry muffins will be an INSTANT brunch hit!
Preheat oven to 375F. Lightly grease a 12-cup muffin tin. Set aside.
In a large bowl, whisk melted butter, sugar, sour cream, eggs, lemon juice, zest, and milk until smooth. Fold in flour, baking powder, and salt until batter is just combined. Fold in poppyseeds and blackberries.
Fill muffin cups 3/4 full and smooth tops. Bake muffins at 375F 15-20 minutes until lightly browned. Cool muffins on a wire cooling rack then remove from pan.
Glaze
In a small bowl, whisk all glaze ingredients until smooth. Drizzle glaze over muffins. Enjoy!