Add the 1 1/2 cup all-purpose flour, 1/2 teaspoon baking powder, 1/2 teaspoon salt, 1/2 cup butter, 1/2 cup granulated sugar, 1/2 cup brown sugar, 1 large egg, and 1 teaspoon pure vanilla extract in a large bowl. Mix until everything is well combined, then fold in the 1 1/4 cups chocolate chips, 1/3 cup peanut butter baking chips, 1/4 cup Peanut Butter M&Ms, and 1/4 cup Mini Reese Cups.