Peanut Butter Jelly Bars Recipe

Name: Peanut Butter Jelly Bars Recipe
Ingredients: For the Jelly:; 1 pound Concord grapes; 1 cup sugar, divided; 1 1/2 teaspoon lemon juice from 1 lemon; For the Bars:; 1/2 cup (1 stick) unsalted butter, melted and cooled; 3/4 cup white sugar; 3/4 cup plus 1 tablespoon (about 7 ounces) dark brown sugar; 2 eggs; 4 teaspoons vanilla; 1 cup (about 8 ounces) smooth peanut butter; 1 1/2 cups (about 7 1/2 ounces) all-purpose flour; 1 teaspoon baking powder; 1 teaspoon salt; 1/2 cup roasted unsalted peanuts, roughly chopped; 1 cup grape jelly