These gluten free peanut butter bars are the no-bake dessert I turn to when I need something fast, creamy, and deeply peanut buttery. They come together with five ingredients and about fifteen minutes of work, then the fridge does the rest.

The base is a soft, almost fudgy layer that tastes like the inside of a peanut butter cup. A thick slab of melted chocolate seals the deal, and a sprinkle of flaky salt makes them impossible to stop eating.

Why These Bars Never Last Long

I’ve made these for potlucks, road trips, and late-night cravings, and the pan is always empty by morning. The texture gets me every time: the center is dense but not crumbly, with a little crunch from the graham cracker crumbs.

The chocolate on top sets into a snap, which you break through to reach the salty-sweet layer below. It’s simple, a little messy in the best way, and absolutely worth keeping a batch in the fridge.

Ingredients

1 cup creamy peanut butter: use a no-stir brand like Jif or Skippy; natural peanut butter can separate and make the bars oily
½ cup unsalted butter, melted: if using salted butter, skip the extra salt
2 cups powdered sugar: this sweetens and helps the bars hold their shape; do not substitute granulated sugar
1½ cups gluten free graham cracker crumbs: look for certified gluten free, or crush your own from gluten free graham crackers
10 oz semi-sweet chocolate chips: about 1½ cups; dark chocolate chips work too
Flaky sea salt: for sprinkling, optional

Variations / Substitutions

Nut-free: swap peanut butter for sunflower seed butter and use gluten free graham crackers that are nut-free.
Dairy-free: use a vegan buttery stick and dairy-free chocolate chips.
Extra crunch: fold in ¼ cup roasted peanuts or a handful of crispy rice cereal into the base.
White chocolate top: replace semi-sweet chips with white chocolate chips for a sweeter finish.

If you love the chocolate-peanut butter combo, our Flourless Peanut Butter Cookies are another quick gluten free treat.

How to Make 5-Ingredient Gluten Free Peanut Butter Bars

Step 1: Mix the Peanut Butter Base

In a large bowl, stir together the 1 cup creamy peanut butter and ½ cup melted butter until smooth and fully combined, about 1 minute. Mix in the 2 cups powdered sugar and 1½ cups gluten free graham cracker crumbs until a thick dough forms. It will look crumbly at first but should hold together when you squeeze a handful. Keep working it with your hands if needed; the warmth from your palms helps it come together.

Step 2: Press into the Pan

Line an 8×8-inch square baking pan with parchment paper, leaving some overhang for easy lifting. Transfer the peanut butter mixture into the pan and press it firmly into an even layer, taking about a minute to really pack it down. The back of a measuring cup works well for this. Any loose spots can cause the bars to crumble later.

Step 3: Pour the Chocolate Topping

Place the 10 oz chocolate chips in a microwave-safe bowl and heat in 30-second bursts, stirring between each, until completely smooth and melted, about 1½ minutes total. Pour the melted chocolate over the peanut butter layer and tilt the pan or use an offset spatula to spread it evenly to the edges. If you like, scatter a little flaky sea salt on top right away so it sticks. Refrigerate the bars for at least 1 hour, until the chocolate is set and shiny.

Step 4: Slice and Serve

Once the chocolate is firm, lift the whole block out of the pan using the parchment overhang. Place it on a cutting board and, using a sharp knife, cut into 16 squares. The bars are best served cold straight from the fridge, and they hold their shape well when chilled.

Tips for No-Bake Peanut Butter Bars

If your kitchen is warm, pop the pressed base into the fridge for 15 minutes before adding the chocolate so it doesn’t get too soft.
For the neatest squares, chill the pan for 30 minutes before lifting, then cut with a hot, dry knife, wiping between slices.
To make them in a 9×9-inch pan, the bars will be thinner; reduce the chilling time to about 45 minutes.

Scale it for a larger crowd:

Pan Size	Peanut Butter	Butter	Powdered Sugar	Graham Crumbs	Chocolate Chips	Chilling Time
8×8-in	1 cup	½ cup	2 cups	1½ cups	10 oz	at least 1 hr
9×13-in	2 cups	1 cup	4 cups	3 cups	20 oz	at least 1 hr

Storing the Bars

Refrigerate: Keep the bars in an airtight container in the fridge for up to a week.
Freeze: Wrap individual bars in wax paper and freeze for up to 3 months. Let them thaw in the fridge before eating.

What to Serve with These Peanut Butter Bars

Pair a couple of bars with a tall glass of cold milk or a strong cup of coffee for a classic after-dinner treat. For something fancier, top with a scoop of vanilla ice cream and a drizzle of caramel sauce.

Frequently Asked Questions

Can I use natural peanut butter instead of the shelf-stable kind?

Yes, but stir the peanut butter very well to incorporate any separated oil first. The bars may be a bit softer, so adding an extra tablespoon or two of graham cracker crumbs can help them hold together.

Why won’t my bars set up?

If the mixture feels too soft even after chilling, it’s usually because the peanut butter was too oily or the graham crumbs weren’t packed firmly enough. Pressing the base down tightly is key.

Can I make these without chocolate?

You can skip the topping, but the bars will taste more like unbaked peanut butter cookie dough. A dusting of cocoa powder or a drizzle of melted peanut butter are good alternatives.