Preheat oven to 350 degrees F (180 degrees C) and grease a 9x13-inch pan or line with parchment paper.
In a large mixing bowl, combine the dry ingredients: All-Purpose Flour (3 cup), Baking Powder (1 teaspoon), and Salt (1/2 teaspoon). Whisk to combine.
In another bowl, cream together Unsalted Butter (1 cup) and Creamy Natural Peanut Butter (1 1/2 cup). Add Granulated Sugar (3/4 cup) and Brown Sugar (3/4 cup) and continue to cream until well combined.
Beat in Egg (2) , one at a time. Add Vanilla Extract (1 teaspoon). Then, with the mixer on low, add the dry ingredients and mix until well combined.
Press ½ to ⅔ of the mixture into the prepared pan. Evenly spread Grape Jelly (1 1/2 cup) over crust.
Scatter remaining crust over top of jelly and top with Dry Roasted Peanuts (1/2 cup). Place in preheated oven and bake for 30 to 35 minutes, until top is golden brown.
Remove from oven and let cool before slicing. Serve and enjoy!