Blondies Recipe

Name: Blondies Recipe
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: American
Ingredients: 1¾ cups all-purpose flour ((210g)); 1 teaspoon baking powder; ¼ teaspoon baking soda; ¾ teaspoon salt; 1 cup packed light brown sugar ((220g)); ½ cup unsalted butter (melted (113g)); 1 large egg (room temperature); 2 teaspoons vanilla extract; 1 cup mix-in’s (such as white, semi-sweet chocolate or butterscotch chips; chopped nuts such as walnuts, pecans, or almonds (180g))