The best pumpkin bars ever! Preheat oven to 350* Line and grease a 9x13 cake pan In a medium bowl add: 2 cups flour 1 tsp baking powder 1/2 tsp baking soda 1/2 tsp salt 2 1/2 tsp pumpkin pie spice In a large bowl add: 1 15oz can pumpkin purée 2 eggs 1/2 cup vegetable oil 1