Sour Cream Pound Cake

1 box golden butter cake mix
1/2 cup sugar
1 small container sour cream 
3/4 cup oil
4 eggs 
Combine ingredients in a bowl, mixing well after adding each egg. 
Pour into greased and floured bundt pan. Top with crumb mixture. 
Bake at 350 degrees for about 40-45 minutes or until cooked- check 
at 35 minutes. 

Crumb Mixture
4 tbsp. brown sugar
1 cup pecans or walnuts chopped
1 tsp. cinnamon