Follow these simple steps to whip up your delicious Monster Blondies:

Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking pan or line it with parchment paper.

In a large mixing bowl, combine the melted butter, brown sugar, and granulated sugar. Mix until well combined.

Add the eggs and vanilla extract, stirring until smooth.

In a separate bowl, whisk together the flour, baking powder, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fold in the chocolate chips, butterscotch chips, nuts, and sprinkles if using.

Pour the batter into the prepared baking pan and spread it evenly.

Bake in the preheated oven for 25-30 minutes or until the edges are golden brown and a toothpick inserted in the center comes out clean.

Allow the blondies to cool in the pan before cutting them into squares.