Cinnamon Walnut Streusel Coffee Cake
Instructions
Combine flour baking powder baking soda salt, set aside
Combine streusel ingredients, set aside
Mix sugar and butter until creamy
Add eggs one at a time
Add vanilla
Add dry ingredients and sour cream half at a time
Add 1/2 of the cake mixture to a 10 x 14" coated baking pan
Sprinkle with 2/3 of the streusel
Top with the remaining cake mixture
Top with the remaining streusel
Bake for 50 minutes at 350 degrees
Cool on baking rack for one hour before serving