White Chocolate Chunk Cinnamon Coffee Cake

Mix topping ingredients and set aside.

Mix flour , baking soda , baking powder , and salt and set aside.

Beat butter , sugar , and vanilla until light and fluffy.

Beat in eggs , one at a time.

Blend in sour cream.

Mix in flour mixture and mix until smooth.

Spread 1 / 2 of the batter in a greased 9x13 pan.

Top with 1 / 2 of the topping mixture.

Repeat layers.

Bake at 350 degrees for 45 to 50 minutes or until a toothpick inserted into the center comes out clean.

Cool in pan.

white chocolate baking bar, nuts, sugar, cinnamon, flour, baking soda, baking powder, salt, butter, vanilla, eggs, sour cream