01 -
Preheat oven according to brownie mix instructions. Line a 9x13 inch baking pan with parchment paper, allowing edges to extend for easy removal.
02 -
Combine brownie mix with required ingredients (usually eggs, oil, water) as directed on the package or use your homemade batter. Stir until smooth and evenly blended.
03 -
Pour batter evenly into the prepared pan. Bake for 30 to 45 minutes, checking doneness by inserting a toothpick; it should come out with moist crumbs but no wet batter.
04 -
Allow brownies to cool in the pan for 10 minutes. Use parchment to lift out and transfer to a wire rack. Cool completely for 1 to 2 hours before frosting.
05 -
Divide vanilla frosting into separate bowls. Add gel food coloring drops gradually and mix until vibrant colors are achieved without thinning consistency.
06 -
Spread colored frosting over cooled brownies, either covering entire surface uniformly or creating sections with different colors. Use an offset spatula or butter knife for textured effects.
07 -
Immediately press candy eyes, sprinkles, and optional decorations into frosting before it sets, creating unique monster designs on each brownie piece.
08 -
Cut brownies into squares or rectangles with a warm damp knife for clean edges. Arrange on a platter and serve at room temperature.