Wonderful Coffee Cake Recipe

This is an easy streusel coffee cake, baked in a square or round layer-cake pan.
Cook Time: 30 minutes
Ingredients:
Topping:
1/2 cup brown sugar
1/4 cup sifted all-purpose flour (sift before measuring)
1/4 cup butter, room temperature
1 teaspoon cinnamon
.
Cake:
1 1/2 cups sifted all-purpose flour (sift before measuring)
2 1/2 teaspoons baking powder
1/2 teaspoon salt
1 egg, beaten
3/4 cup sugar
1/3 cup melted [...]