Peanut Butter and Jelly Bars

INGREDIENTS

• 3 cups all-purpose flour, plus more for dusting pan
• 1 teaspoon baking powder
• 1½ teaspoons salt
• 1 cup (2 sticks) unsalted butter, at room temperature
• 1½ cups granulated sugar
• 2½ cups smooth peanut butter
• 2 large eggs
• 1 teaspoon vanilla extract
• 1½ cups jam or jelly, your favorite flavor
• 2/3 cup salted peanuts, roughly chopped