![](https://static.wixstatic.com/media/02340f_aad9c6e6ad244e8fb2fd158dcf2bf220~mv2.jpg/v1/fill/w_684,h_1026,al_c,q_85,enc_auto/02340f_aad9c6e6ad244e8fb2fd158dcf2bf220~mv2.jpg)
Ingredients
1 cup unsalted butter melted
1 cup brown sugar packed
3/4 cup sugar
2 large eggs room temperature
1 egg yolk room temperature
2 teaspoons vanilla extract
2 2/3 cups flour
2 teaspoons cornstarch
1/2 teaspoon baking powder
1 teaspoon salt
1 1/4 cups chocolate chips
1 1/4 cup M&M's
Instructions
Preheat oven to 350 degrees and prepare a 9X13 pan by lightly greasing it or lining it with parchment paper.
In a large bowl, combine butter (make sure it's not super hot or it will cook the eggs), brown sugar and sugar. Then add eggs, egg yolk and vanilla extract.
In a separate bowl whisk together flour, cornstarch, baking powder and salt.
Add the dry ingredients to the wet and just before it's all combined add in your chocolate chips and M&M's. Stir and then dump into your prepared pan and spread out evenly.
Bake for 25-30 minutes or until the edges start to turn golden brown. Let cool for 5-10 minutes and then serve warm or completely cooled.
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