Preheat the oven to 350°F and line two large baking sheets with parchment paper.
Using an electric hand mixer or stand mixer fitted with the paddle attachment, cream together the butter, sugar and brown sugar until light and fluffy, approximately 2 minutes.
Mix in the peanut butter until well combined.
Blend in the egg and vanilla extract until smooth.
Slowly add in the flour on low speed, just until combined. Do not overmix.
Using a 1 ½ tablespoon cookie scoop, scoop out the dough and roll into balls. Optional- roll balls in granulated sugar for extra crunch.
Place the rolled cookies on the prepared baking sheets with at least 1 ½ inches between each cookie.
Bake one sheet at a time for 11-14 minutes or just until the cookies are cracked, do not overbake.
Remove from the oven and allow to cool for 3-5 minutes and then use a rounded teaspoon to indent each cookie.
Allow them to cool for an additional 5-10 minutes before removing from the baking sheet to a cooling rack.
While the cookies are baking, make the ganache by placing the chocolate chips in a heat safe bowl.
In a separate, microwave safe bowl, place the heavy cream and heat in 30 second increments until steaming, about 1-2 minutes. Do not boil.
Pour the hot cream over the chocolate chips and let sit for 5 minutes.
Whisk together the chocolate and cream until completely smooth.
When the cookies have been moved to a cooling rack, pipe or scoop in about 1 teaspoon of ganache into each cookie.
Allow cookies to cool and ganache to set before serving.
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Notes
Optional- roll balls in granulated sugar for extra crunch.