No-Bake Sugar-Free Peanut Butter Bars

No-Bake Sugar-Free Peanut Butter Bars

A thick peanut butter and peanut-flour base gives these chilled bars a dense, compact bite beneath a smooth chocolate topping. The mixture should hold together like soft dough before it goes into the pan; that matters more than using every last bit of peanut flour. A light scatter of flaky salt finishes the bars, which set in the refrigerator without baking.

Prep time: 20 minutes | Active melting time: about 5 minutes | Chilling time: about 1 to 2 hours | Total time: about 1 hour 35 minutes to 2 hours 20 minutes | Yield: 16 bars

Ingredients for No-Bake Sugar-Free Peanut Butter Bars

• 1 cup creamy, relatively firm peanut butter (250g)
• 4 tablespoons unsalted butter, melted and cooled slightly (55g)
• 1 cup powdered sugar-free sweetener (about 120g), adjusted within the product’s guidance
• 1 cup roasted peanut flour (about 95g), added gradually
• 1/4 teaspoon fine salt, or less if the peanut butter is salty
• 6 ounces sugar-free chocolate, chopped or in chips (170g)
• 1 tablespoon butter or coconut oil
• 1 to 2 teaspoons flaky sea salt, for a light scatter

Optional: 1/2 teaspoon vanilla extract, mixed into the peanut base with the melted butter.

How to Make No-Bake Peanut Butter Bars

1. Line the pan: Line an 8-inch square pan with parchment, leaving overhang on two sides to lift out the slab.
2. Mix the peanut base: Stir together the peanut butter and slightly cooled melted butter. Mix in the powdered sweetener and fine salt, then add the peanut flour gradually. Stop when the mixture holds together like soft, pressable dough. If it is loose, add more flour 1 tablespoon at a time; if it crumbles, mix in a little more peanut butter.
3. Press and chill: Press the mixture firmly and evenly into the pan, including the corners. Refrigerate for 10 to 15 minutes while preparing the topping.
4. Melt the chocolate: Put the chocolate and 1 tablespoon butter or coconut oil in a heatproof bowl over a saucepan of barely simmering water. Keep the bowl above the water and stir gently until smooth, taking care to keep water and steam out of the chocolate.
5. Top the bars: Spread the chocolate over the chilled base in a smooth, even layer that reaches the edges. Scatter the flaky salt over it while the chocolate is still soft.
6. Chill until set: Refrigerate uncovered and start checking after about 1 hour. Allow up to about 2 hours as needed: the chocolate should no longer be tacky, and the slab should feel firm. For a faster set, use the freezer and check periodically rather than relying on a fixed time.
7. Cut into bars: Lift out the slab using the parchment. If it is very hard, let it stand briefly, then cut into 16 rectangular bars with a warm, completely dry knife. Wipe and rewarm the blade between cuts as needed.

What the Peanut Butter Base Should Feel Like

The mixture should hold together when pressed without flowing or looking oily. Peanut butter varies in firmness, so the full cup of flour may not always be needed. Adding too much can make the base crumbly; mix in a little more peanut butter if that happens.

How to Keep the Chocolate from Cracking

Wait until both layers are fully set, but let a very cold slab stand briefly before slicing. Use steady downward cuts rather than sawing, and keep the warmed knife dry so moisture does not touch the chocolate.

Choosing Sweetener and Chocolate

Use a powdered sugar-free sweetener intended for baking or desserts. It disperses more smoothly through the no-bake base than granulated sweetener, which may leave a gritty texture. Sweetness and bulk vary by product, so equal-volume swaps may not give the same result.

Choose chocolate labeled sugar-free for your needs. A high cocoa percentage alone does not mean a chocolate is sugar-free.

Storing and Freezing

Keep the set bars covered in the refrigerator and serve them chilled, especially in a warm room where the topping may soften. The slab can be made ahead and cut once fully set; no reheating is needed.

For longer keeping, wrap the bars or separate them with parchment before freezing. Let frozen bars soften briefly in the refrigerator or at room temperature before serving.

Nutrition

Approximate nutrition per bar, based on 16 bars: 200 calories, 8g protein, 17g fat, and 10g carbohydrates. Approximate nutrition per 100g: 450 calories, 18g protein, 38g fat, and 23g carbohydrates. Values can vary substantially by brand, particularly the chocolate and sweetener.