Martha's Peanut Butter and Jelly Bars

I found this recipe at Martha Stewart. At first I didn't care for it much, but I've discovered that by using a lot less salt, and refrigerating the bars before serving, they are very addictive. I've tweaked the recipe a bit here. If you try this one, I'll be interested to know what you think of it.


Ingredients
1 cup unsalted butter, room temperature
3 cups all-purpose flour
1-1/2 cups sugar
2 large eggs
2-1/2 cups smooth peanut butter
1/2 tsp salt
1 tsp baking powder
1 tsp vanilla extract
1-1/2 cups your favorite jam or jelly
2/3 cup peanuts, roughly chopped

Directions
1. Heat oven to 350 degrees. Grease a 9-by-13-inch pan with butter and coat inside of pan with flour; set aside. Place butter and sugar in the bowl of an electric mixer and beat on medium-high speed until fluffy, about 2 minutes. On medium speed, add eggs and peanut butter; beat until combined, about 2 minutes.
2. Whisk together salt, baking powder, and flour. Add to bowl of mixer on low speed; combine. Add vanilla. Transfer two-thirds of mixture to prepared pan; spread evenly. Stir jam to make it smooth and easier to spread, then spread jam on top of peanut-butter mixture. Spoon remaining third of peanut-butter mixture on top of jam. Sprinkle with peanuts. Press peanuts lightly into peanut butter mixture.
3. Bake until golden, about 45 minutes. Cool completely before cutting into bars. Refrigerate for a chilly taste sensation.