01 -
Heat your oven to 350°F and prepare a 12-inch pizza pan by greasing it or lining it with parchment paper.
02 -
In a large bowl, stir the melted butter and granulated sugar together until glossy. Add eggs one at a time, mixing thoroughly after each addition. Stir in the vanilla extract.
03 -
In a separate bowl, whisk together the flour and salt. Gradually add this to the wet mixture, stirring just until combined to avoid overmixing.
04 -
Fold in the white chocolate chips and 1 cup of M&M's using a spatula. The batter will be thick and colorful.
05 -
Spread the batter evenly in the prepared pan and smooth the top. Bake for 25-30 minutes, or until the edges are golden and a toothpick inserted in the center comes out with a few moist crumbs.
06 -
Let the baked brownie cool completely in the pan. Once cooled, sprinkle extra M&M's on top, slice into wedges like a pizza, and serve.