Easy Fudgy M&M Brownies Recipe

Ingredients

• 1½ cups white sugar, the regular granulated kind
• ½ cup powdered sugar, for that perfect texture
• 3 large eggs, straight from the fridge
• 1 egg yolk, for extra richness
• ½ cup unsalted butter, melted and slightly cooled
• ½ cup vegetable or canola oil
• 1 teaspoon pure vanilla extract
• 1 cup all-purpose flour, spooned and leveled
• 1 cup unsweetened cocoa powder
• 1 tablespoon cornstarch, for that fudgy texture
• 1 teaspoon salt
• ⅓ cup semi-sweet chocolate chips
• ¾ cup regular M&M's
• ½ cup mini M&M's