Gather the ingredients for your PB and J cookies.
Preheat the oven to 350°F and line your baking sheets with parchment paper.
Beat the butter until creamy, then add the sugars. Mix until smooth and fluffy.
Add the peanut butter and mix until everything comes together.
Beat in the egg and vanilla extract.
Add the flour, then the baking soda and salt. Stir to combine, then use the mixer to bring the dough together.
Mix until only a few streaks of flour remain. Scrape the bowl, then mix again until everything is fully combined.
Scoop and shape the dough into 1 1/2 inch balls.
Dip a fork in flour and press it onto each dough ball to make a crosshatch pattern, just like classic peanut butter cookies. Flatten them until they are about half an inch thick.
Pour the jam into a small bowl and stir until smooth.
Spoon about a teaspoon of jam onto the center of each cookie.
Bake the cookies for 13 to 15 minutes or until the edges are set and lightly browned.
Let the cookies rest on the pan for 5 minutes, then transfer them to a wire rack to cool completely.
Drizzle with melted peanut butter and sprinkle chopped peanuts on top. Enjoy!