Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking pan or line it with parchment paper.

Prepare the Peanut Butter Dough

In a large mixing bowl, beat the peanut butter, softened butter, granulated sugar, and brown sugar together until creamy and well combined.
Add the eggs, one at a time, beating well after each addition.
Mix in the vanilla extract.
In a separate bowl, whisk together the flour, salt, and baking powder.
Gradually add the dry ingredients to the peanut butter mixture, mixing until just combined.

Assemble the Bars

Press half of the peanut butter dough into the prepared baking pan, spreading it evenly to cover the bottom.
Spread the jam evenly over the dough layer.
Drop small spoonfuls of the remaining peanut butter dough over the jam layer. Gently spread and press the dough to cover the jam as much as possible. It’s okay if some jam peeks through.

Bake
Bake in the preheated oven for 25-30 minutes, or until the top is golden and the edges are set. A toothpick inserted into the center should come out with a few moist crumbs.
Remove from the oven and allow the bars to cool completely in the pan.
Once cooled, cut into squares or bars and enjoy your delicious creation!