01 -
Heat your oven to 350°F. Give a 9x13 baking dish a light coat of cooking spray and set it aside.
02 -
In a large bowl, combine the cake mix, eggs, oil, and vanilla. Stir until everything is just mixed together. Gently fold in those colorful Easter M&Ms and chocolate chips.
03 -
Press the cookie dough into your prepared baking dish, spreading it out evenly with a spatula.
04 -
Bake for 20-25 minutes until the edges are lightly golden. Let the bars cool completely before cutting - this is crucial for clean slices!