Preheat your oven to 350° in line a baking sheet with a piece of parchment paper

In a large mixing bowl, beat your butter, peanut butter, and sugars together until light and fluffy

Mix in your egg and vanilla extract

In a separate mixing bowl, combine your flour and baking soda and mix

Add your dry ingredients to your wet ingredients and mix until you have a thick dough

Roll your dough in a small ball and form into a heart shape

Lay your cookie dough hearts onto your baking sheet and press each side down with a fork twice using a criss cross pattern with your fork

Bake for 8 minutes and let cool