Valentine’s Day Cookie Pie

Name: Valentine’s Day Cookie Pie
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: American
Ingredients: 2 sticks (8 ounces) unsalted butter, melted; 1 cup light brown sugar, packed; 1 cup granulated sugar; 1 large egg plus 2 egg yolks, at room temperature; 1 tablespoon vanilla extract; 2 cups all-purpose flour; 1/4 cup cornstarch; 1/2 teaspoon salt; 2 cups Valentine's day M&M's (although regular will work); 3/4 cup mini heart shaped peanut butter cups, chopped (regular mini peanut butter cups will work)