Preheat oven to 325°.
In a large bowl, cream together melted butter, brown sugar, and granulated sugar for one minute.
In a small bowl, whisk together egg, egg yolk and vanilla. Add egg mixture to sugar mixture and mix well.
Stir in baking soda, salt and flour and mix until half of the flour is incorporated.
Mix in chocolate chips and combine dough just until all the flour is incorporated.
Place onto a large pizza pan and press into a heart shape. Your dough should be about 1/2" thick.
Make the heart pretty exaggerated so when it bakes it will make the perfect heart.
Bake for 20-25 minutes or just until the edges are slightly golden brown and the center top is no longer glistening.
Remove and immediately press peanut butter cup hearts onto the top. You can also press in a few chocolate chips as well.
Let it cool for 20 minutes before serving.