Cinnamon Coffee Cake - Kaffeekuchen - cooking recipe

Ingredients

2 cups flour
1/2 cup butter, unsalted
1 3/4 cups sugar
1 tablespoon cinnamon
1/4 cup nuts
1 teaspoon baking soda
1 teaspoon baking powder
1 cup milk, mixed with
2 teaspoons vinegar, to sour
1 egg

Preparation

Mix first three ingredients until crumbly.Remove 1/2 c mixture and mix with cinnamon and nuts. RESERVE for topping.
Add baking soda and baking powder to step 1 mixture and stir to mix it all in evenly.
Add vinegar to milk to sour the milk. Stir egg into the milk and stir vigorously with a fork to blend the egg. Add to the dry mixture and stir just until blended.
Spray or grease a 9x13 pan and pour mixture into pan. Top with reserved topping.
Bake at 350 degrees until toothpick inserted in center comes out clean, about 30 minutes.