01 -
Preheat your oven to 350°F (175°C). Grease a 9-inch round cake pan or line it with parchment paper.
02 -
In a large bowl, whisk together the melted butter, brown sugar, and granulated sugar until smooth. Add the egg, egg yolk, and vanilla extract, and mix well.
03 -
In a separate bowl, whisk together the flour, baking soda, and salt.
04 -
Gradually add the dry ingredients to the wet ingredients, stirring until just combined. Fold in the chocolate chips and M&M's.
05 -
Press the cookie dough evenly into the prepared cake pan. Bake for 22-25 minutes, or until the edges are golden brown and the center is slightly soft.
06 -
Let the cookie cake cool in the pan for at least 30 minutes before removing it.
07 -
Beat the butter until creamy. Gradually add powdered sugar, vanilla extract, and heavy cream, beating until smooth. Divide and color with food coloring if desired.
08 -
Pipe frosting around the edges and top with extra M&M's, sprinkles, or Easter candies.
09 -
Cut into wedges and enjoy your festive Easter treat!