Preheat oven to 350 degrees F and set a mini muffin pan aside until ready to use.
In a large mixing bowl with paddle attachment, cream together the butter, granulated sugar, light brown sugar until light and fluffy.
Add the creamy peanut butter and vanilla extract into the butter mixture and mix until smooth and creamy.
Add in the flour, baking soda and salt and mix just until dry ingredients are combined.
Scoop the cookie dough into 1.5 ounce balls and press them into mini muffin molds.
Bake for 9-10 minutes or until the edges are lightly golden browned and the center is still soft.
Remove the muffin pan from the oven and press the chocolate peanut butter hearts or mini chocolate peanut butter cups into the warm cookies.
Allow the cookies to cool for 10 minutes or until the chocolate is set. Remove the cookies from the pan and enjoy or store in an airtight container for up to 4 days.