Combine the peanut butter and powdered sugar and stir until combined. You may need a bit of elbow grease to really get it!
Spoon the mixture in about 1 ½ teaspoon dollops onto parchment lined pan. Freeze for about an hour to set. (you should get about 24 dollops) If you can’t get them easily scooped, you can freeze this mixture for about 15 minutes and then spoon it.
Whisk together the flour, sea salt, baking soda and corn starch. Set aside. Combine the melted butter and sugars and whisk until smooth. Add in the eggs and vanilla and whisk until silky smooth.
Stir in the flour mixture. Don't over mix. Just mix until the flour is incorporated. Fold in the peanut butter and chocolate chips.
Chill the cookie dough for about 1 hour (can be chilled up to about 2 days). For ease in forming the cookies if chilling longer than an hour, chill the dough for about 30 minutes and then use a 1½ tablespoon cookie scoop and roll into balls. Arrange on a parchment lined dish or container and chill for the remaining time.
Once the cookie dough and peanut butter dollops are chilled, scoop the cookie dough in about 2 ½ - 3 Tbsp balls. Press a hole into the center and place the peanut butter inside. Pull the cookie dough up to cover most of the peanut butter, but you can leave it peaking out a bit. Add some extra pb and chocolate chips over top of the cookies—like more than seems reasonable, trust me.
Bake in oven preheated to 350°F for about 10-13 minutes, or until the edges are set and just starting to become golden brown.
Cool and then transfer to a wire rack and sprinkle with flaky sea salt. Enjoy!