One 9-inch square coffee cake.
All ingredients at room temperature.
Preheat oven to 350 degrees
Grease a 9 in. square baking pan
Whisk together thoroughly:
1 ½ cups all-purpose flour
1 cup sugar
2 teaspoons baking power
½ teaspoon baking soda
¼ teaspoon salt
In a large bowl, beat well the following:
1 cup sour cream (Sounds crazy, but we’re serious! The cake will be delicious! We promise!)
2 large eggs
Add the dry ingredients & beat until just smooth. Overbeating tends to toughen the cake. Spread in the greased pan.
Sprinkle with Streusel.
Bake until a toothpick comes out clean, about 25 min. Cool on a rack.
STREUSEL
Makes 2/3 to 3/4 cup
Combine:
1/3 cup sugar
2 tablespoons all purpose flour
2 tablespoons unsalted butter
Blend these ingredients until crumbly.
Add:
1/2 teaspoon ground cinnamon
(1/4 to 1/2 cup chopped nuts)