Combine flour, baking powder, salt and sugars in large bowl. Cut in butter and peanut butter until mixture resembles coarse meal. Reserve 1-1/2 cups as crumb mixture.

 

Combine milk, eggs, and vanilla; add to flour mixture, stir until dry ingredients are moistened. Stir in 1/2 cup of peanuts. Pour into greased 13-1/2x9x2-inch pan. Add remaining 1/2 cups of peanuts and cinnamon to reserved crumb mixture and sprinkle evenly over the top of batter. Pat down gently.

 

Bake in preheated 350 degree F oven for 30 to 35 minutes.