Grease muffin tin and set aside. Preheat oven to 375 degrees F.
In a small bowl combine streusel ingredients until it resembles moist crumbs.
In as medium bowl combine flour, sugar and baking powder. Set aside.
In a small bowl combine butter, milk and beaten egg. Add to flour mixture stirring just until combined. Spoon half of batter into greased tins. Depending on size of raspberries, place 2 or 3 on top of batter and sprinkle with half of streusel mixture.
Top with remaining batter and add 1 -2 more raspberries and remaining streusel.