Preheat your oven to 350°F (175°C). This is a crucial step that ensures your cookies bake evenly.
In a mixing bowl, whisk together the 2 cups of all-purpose flour and 1/2 teaspoon of baking soda. Set this mixture aside.
In a separate bowl, combine the 8 tablespoons of melted butter and 6 tablespoons of melted peanut butter. Stir in 1 cup of brown sugar and 1/2 cup of sugar until well combined.
Add 1 egg and 1 egg yolk (at room temperature) to the butter mixture, along with 2 teaspoons of vanilla extract. Beat until the mixture is smooth and creamy.
Gradually add the dry ingredient mixture to the wet ingredients, stirring until just combined. Be careful not to over-mix, as this can lead to tough cookies.
Gently fold in the 1 1/2 cups of chocolate chips, ensuring they are evenly distributed throughout the dough.
Using a cookie scoop or tablespoon, drop rounded balls of dough onto a prepared baking sheet. Leave ample space between each cookie, as they will spread while baking. Bake in the preheated oven for 10-12 minutes, or until the edges are golden brown.
Once baked, remove the cookies from the oven and let them cool on the baking sheet for a few minutes before transferring them to a cooling rack. This will allow them to set perfectly. Enjoy your puffy peanut butter cookies with chocolate chips warm or at room temperature!
