Snickerdoodle Bars

2 1/3 cups all purpose flour
1 1/4 tsp baking powder
1/2 tsp salt
3/4 cup butter or margarine, softened
1 1/4 cups sugar
1/2 cup packed brown sugar
3 eggs
1 tsp vanilla

Cinnamon Filling
1 Tbs sugar
1 Tbs cinnamon

Glaze
1 cup powdered sugar
1 to 2 tbs milk
1/4 tsp vanilla

Heat oven to 350 degrees.  Grease bottom of 9x13-inch baking pan.  In a small pan, combine flour, baking powder, and salt, set aside.
In large bowl, beat butter with electric mixer on high speed until creamy.  Beat in sugars.  Gradually beat in eggs and vanilla.  On low speed, beat in dry ingredients until combined.
Spoon half the batter into pan; spread evenly.  Sprinkle with Cinnamon-sugar mixture evenly over batter.
Dollop teaspoon size amounts of remaining batter evenly over cinnamon-sugar mixture.
Bake 20-25 minutes or until golden brown and toothpick inserted in center comes out clean.  Cool completely.
In small bowl, stir glaze ingredients until smooth and thin enough to drizzle.  Drizzle over bars.