In a large bowl (I used my stand mixer), add the butter, coconut oil, sugar, brown sugar, and vanilla. Beat until creamy.
1 stick butter, 1 cup coconut oil, 3/4 cup sugar, 3/4 cup packed brown sugar, 1 teaspoon vanilla extract
Add in the eggs, one at a time, beating well after each one.
2 eggs
Gradually beat in the flour mixture - I do it in thirds.
Stir in the chocolate chips and 1/4 cup of the peanut butter M&Ms.
1/2 cup dark chocolate chips, 1/2 cup peanut butter M&Ms
Spread the dough into the prepared jelly roll then press the remaining 1/4 cup of peanut butter M&Ms into the top.
Bake for 20-25 minutes or until golden brown.
While the bars were baking, I took the remaining dough and scooped out 12 cookies onto a baking sheet lined with a Silpat. Once the bars were done, I baked the cookies for about 10 minutes until the edges were golden brown.