M&M Blondies

Name: M&M Blondies
Cook time: 1800 s
Total time: 1800 s
Yield: 16 servings
Ingredients: 2 1/2 c flour; 1 tsp baking powder; 1 tsp baking soda; 1 tsp salt; 1 1/2 c brown sugar; 1 c butter, melted; 2 eggs; 1 egg yolk; 1 tbsp vanilla; 1 c m&m's; 1/2 c mini chocolate chips