Cake:
1 3/4 c. Flour
1 tsp. Baking Powder
1 tsp. Soda
1/4 tsp. Salt
3/4 c. Granulated Sugar
1/2 c. Butter
1 tsp. Vanilla
3 Eggs
1 c. Sour Cream

Combine flour, baking powder, soda and salt, set aside.
In separate bowl cream butter, sugar and vanilla.
Add eggs, beat well.
Mix in flour alternately with sour cream.
Spread half of batter into into greased bundt pan.
Sprinkle with half of streusel.
Repeat with second half of batter and streusel.
Bake 50-55 minutes at 350°F.

Streusel:
1/3 c. Brown Sugar
1/4 c. Flour
1/4 c. Butter
1/2 c. Walnuts, chopped
1/2 c. Mini Chocolate Chips

With a fork or pastry blender combine brown sugar, flour and butter until crumbly.
Stir in mini chocolate chips and walnuts.