Preheat the oven to 350 degrees and line a 9x13 baking dish with parchment paper or foil (this will help to cut the hearts out).

Combine the butter, brown sugar, eggs, and vanilla stirring until smooth and creamy.

In a smaller bowl, combine the dry ingredients – flour, baking soda, baking powder and salt. Slowly fold these dry ingredients in with the wet ingredients.

Add in the chocolate chips and Valentine M&M's.

Pour the mixture into the 9x13 pan and the spoon to evenly spread it in the pan.

Bake 25-30 minutes.

Remove from the oven and allow to cool before cutting the bars into heart shapes