Preheat oven to 375°. Prepare muffin tins with liners or spray with cooking spray.
Whisk together the butter, eggs and milk. In a separate bowl, whik flour, sugar, baking powder and salt until combined.
Stir the wet ingredients into dry ingredients until just combined. Be careful not to overmix or the muffins with be tough. Lightly fold in the haskap berries.
Spoon into muffin tin and sprinkle with some sugar.
Bake for 25-30 minutes (until a toothpick inserted comes out clean). Enjoy!