# Ingredient List:
→ Dry Ingredients
01 - 2 cups all-purpose flour
02 - 1 ½ teaspoons baking powder
03 - ½ teaspoon baking soda
04 - ½ teaspoon salt
05 - 1 teaspoon cinnamon, optional
→ Wet Ingredients
06 - ½ cup unsalted butter, melted and slightly cooled
07 - 1 cup granulated sugar
08 - 2 large eggs
09 - 1 cup whole milk or buttermilk
10 - 1 teaspoon vanilla extract
→ Fun Mix-ins
11 - ½ cup mini chocolate chips
12 - ½ cup rainbow sprinkles
13 - ⅓ cup creamy peanut butter
14 - ½ cup chopped walnuts or pecans, optional
15 - ½ cup mini marshmallows
# Directions:
01 - Preheat oven to 350°F. Lightly grease and line a 9x5-inch loaf pan with parchment paper.
02 - In a large mixing bowl, whisk together the flour, baking powder, baking soda, salt, and cinnamon until evenly blended.
03 - In a separate bowl, whisk melted butter and sugar until integrated. Add eggs individually, beating thoroughly after each. Stir in milk and vanilla extract until smooth.
04 - Pour the wet ingredient mixture into the dry ingredients, mixing gently until just combined. Avoid overmixing for optimal texture.
05 - Carefully fold in mini chocolate chips, rainbow sprinkles, nuts if using, and mini marshmallows.
06 - Pour half of the batter into the prepared loaf pan. Dollop half of the peanut butter over the batter and swirl gently with a knife. Add the remaining batter and peanut butter, repeating the swirl.
07 - Bake for 50 to 55 minutes or until a toothpick inserted in the center emerges with just a few moist crumbs.
08 - Allow loaf to cool in the pan for 15 minutes, then transfer to a wire rack to cool completely before slicing.
