01 -
Heat your oven to 350°F. Grease a 12-inch pizza pan or line it with parchment paper.
02 -
In a large bowl, stir together the melted butter and sugar until glossy. Add eggs one at a time, mixing well after each. Pour in the vanilla and stir to combine.
03 -
Whisk the flour and salt in a separate bowl. Gradually add to the wet mixture, stirring just until combined. 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 comes out with a few moist crumbs.
06 -
Let the brownie base cool completely in the pan. Once cooled, sprinkle extra M&M's on top, slice into wedges like a pizza, and enjoy!