Preheat oven to 350 degrees. Grease an 8 x 8 inch baking pan with cooking spray and set aside.
In a large bowl mix flour, baking powder, salt, cinnamon, nutmeg, ginger and cloves.
In a medium bowl stir pumpkin, sugar, milk, butter and egg until blended.
While stirring pour wet ingredients into flour mixture and stir until just combined.
Pour batter into prepared baking pan and bake for about 30 minutes until a cake tester inserted into the center of the cake comes out clean.
Cool cake on a wire rack completely before frosting.
Butter Pecan Frosting
In a small saucepan add brown sugar,milk and 1 tablespoon butter and stir over medium heat until butter is melted and sugar is dissolved. Remove from heat and cool slightly.
In a large mixing bowl beat remaining confectioners sugar and remaining butter with an electric mixer. While mixing, stir in brown sugar mixture until creamy. If consistency is still thin, add a little more confectioners sugar if needed.