Keto PB Cups Recipe - Easy No Bake (2g Net Carbs)

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Craving a sweet treat without the guilt? These keto PB cups deliver rich, creamy peanut butter wrapped in dark chocolate—with only 2g net carbs per cup. I’ve been making these peanut butter cups for a long time—they’re my go-to whenever I want a chocolatey snack that hits the sweet spot, and now I make a batch every Sunday to keep my sweet tooth happy all week.

Why you’ll love it: No baking required • 2g net carbs per cup • Simple ingredients • Ready in 40 minutes (including freezing) • Tastes better than store-bought

Why Keto Peanut Butter Cups Work So Well

The secret is the ratio: natural peanut butter wrapped in sugar-free dark chocolate that snaps perfectly when you bite. The coconut oil helps the chocolate set firm without being waxy, while a pinch of sea salt brings out all the flavors.

Here’s the game-changer: you don’t need fancy molds. A standard muffin tin works perfectly, and freezing between layers gives you that iconic two-tone look every time.

How Long Does It Take to Make Keto PB Cups

Prep Time	Freezing Time	Total Time	Servings
10 min	30 min	40 min	12 cups

Perfect for satisfying sudden chocolate cravings or prepping healthy snacks for the week!

Ingredients for Keto PB Cups

👉 Simple Pantry Ingredients Most keto kitchens already have everything you need! Just a handful of basic ingredients and you’re ready to go.

Chocolate Layer (Base & Top)

1 cup sugar-free dark chocolate chips (Lily’s brand recommended)
2 tablespoons coconut oil
Substitution: Sugar-free milk chocolate chips for a sweeter taste, or cacao butter instead of coconut oil for firmer texture

Peanut Butter Filling

1/2 cup natural peanut butter (no sugar added)
2 tablespoons powdered erythritol (a keto-friendly sweetener) or monk fruit sweetener
Pinch of sea salt
Substitution: use almond butter or sunflower seed butter for a nut-free version

Optional Add-ins

1 tablespoon almond flour (makes filling firmer and easier to work with)
1/2 teaspoon vanilla extract (adds depth to peanut butter)
Flaky sea salt for topping

Equipment Needed

12-cup muffin tin
Paper cupcake liners
Microwave-safe bowl or double boiler
Spoon or small cookie scoop

A heads up: Don’t use regular peanut butter with added sugar—it’ll spike your carbs and won’t set properly. Stick with natural peanut butter where the oil separates on top. Just stir it well before measuring.

How to Make Keto Peanut Butter Cups (Step-by-Step)

Step 1: Prepare your muffin tin

Line a 12-cup muffin tin with paper cupcake liners. Make sure they’re pressed down flat so your cups have a nice shape.

Silicone liners work too, but paper makes them easier to peel off later.

Step 2: Melt the chocolate

Combine the chocolate chips and 1 tablespoon of coconut oil in a microwave-safe bowl. Microwave in 30-second intervals, stirring between each, until smooth and fully melted (usually 1-2 minutes total).

Don’t overheat—chocolate can seize up and become grainy if it gets too hot.

Step 3: Create the chocolate base

Spoon about 1 tablespoon of melted chocolate into each cupcake liner. Use the back of the spoon to spread it evenly across the bottom and slightly up the sides.

You want a thin layer—too thick and you’ll run out of chocolate for the tops.

Step 4: Freeze the base layer

Place the muffin tin in the freezer for 10-15 minutes until the chocolate is completely firm to the touch.

This step is crucial—if the base isn’t solid, the peanut butter will mix with the chocolate.

Step 5: Make the peanut butter filling

While the base freezes, mix together peanut butter, powdered sweetener, salt, and optional almond flour in a bowl. Stir until completely smooth and uniform.

If the peanut butter is too stiff, microwave it for 10–15 seconds to soften it.

Step 6: Add the peanut butter layer

Remove the tin from the freezer. Drop about 1-2 teaspoons of peanut butter filling onto each chocolate base. Use your fingers or the back of a spoon to gently flatten it, leaving a small border around the edges.

Don’t press all the way to the edges—you want the chocolate to seal around the filling.

Step 7: Add the top chocolate layer

If your chocolate has hardened, reheat it for 20-30 seconds. Spoon the remaining chocolate over each peanut butter layer, making sure to cover completely and seal the edges.

Gently tap the tin on the counter to smooth the tops and release any air bubbles.

Step 8: Final freeze

Return to the freezer for 15-20 minutes until completely set. Sprinkle with flaky sea salt in the last 5 minutes if desired.

They should pop right out of the liners when ready.

Nutrition Information

Per Serving (1 cup, based on 12 servings):

Calories: 110
Protein: 3g
Total Fat: 10g
Saturated Fat: 5g
Total Carbohydrates: 8g
Fiber: 3g
Sugar Alcohols: 3g
Net Carbs: 2g
Sugar: 1g
Sodium: 45mg

✅ Only 2g net carbs • Good source of healthy fats • 92% fewer carbs than regular Reese’s

⚠️ Important Note

Nutrition values are estimates and may vary depending on the brands and ingredients used.

📊 Sources Used for Calculation

USDA FoodData Central
Erythritol – USDA / Cronometer
USDA FoodData Central
Vanilla extract & salt – USDA

Want to understand net carbs better? Check out this guide on calculating net carbs from Diet Doctor.

Keto PB Cups Variations and Substitutions

Want to customize these keto peanut butter cups? Here are swaps that keep you in ketosis:

Nut Butter Swaps: Almond butter for milder flavor, sunflower seed butter for nut-free, or cashew butter for extra creaminess (watch portions on cashew – higher carbs).

Sweetener Options: Monk fruit for no aftertaste, stevia for zero sugar alcohols, or allulose for texture closest to real sugar.

Flavor Twists: Add espresso powder for mocha, peppermint extract for mint chocolate, or cinnamon for spiced version. All add 0g carbs.

Texture Variations: Stir in chopped pecans or cacao nibs for crunch, add 1 teaspoon heavy cream for extra creaminess, or use coconut flour to firm up the filling.

Size Options: Make mini versions in a mini muffin tin for bite-sized fat bombs (1g net carb each) – perfect for portion control.

Pro tip: Add 1 tablespoon MCT oil to the melted chocolate for extra ketone production and firmer texture.

Common Mistakes to Avoid

Not freezing between layers: If you skip the first freeze, the peanut butter sinks into the chocolate and you lose that clean layered look. Always wait until the base is solid.

Using the wrong peanut butter: Regular peanut butter with added sugar won’t set properly and adds unnecessary carbs. Natural peanut butter is essential—yes, even though it’s runnier.

Overheating the chocolate: Chocolate burns easily in the microwave. Always use 30-second intervals and stir between each one. Burned chocolate gets grainy and bitter.

Making the layers too thick: If you use too much chocolate on the bottom, you’ll run out for the tops. Aim for thin, even layers—about 1 tablespoon per layer works perfectly.

Storing at room temperature: These will soften and get messy if left out. Coconut oil melts around 76°F, so always keep them refrigerated or frozen until you’re ready to eat.

Storage and Freezing Tips

These keto PB cups keep beautifully, which is why I always make a double batch for easy grab-and-go treats.

Making Keto PB Cups for Meal Prep

Store in the fridge for up to 2 weeks or freeze for up to 3 months. They’re perfect for portion-controlled desserts.

Refrigerator: Keep in an airtight container between layers of parchment paper for up to 2 weeks. They stay firm and ready to eat straight from the fridge.

Freezer: Freeze up to 3 months in a freezer-safe container. I like storing them in individual portions so I can grab just one when a craving hits without thawing the whole batch.

Serving from frozen or cold:

From fridge: Ready to eat immediately, firm texture
From freezer: Let sit 2-3 minutes for easier bite, or eat frozen for a firmer treat
Room temp: Only if eating within 10 minutes—they’ll start to soften

Pro Tip: Keep a stash in both the fridge and freezer. Fridge cups are perfect for everyday snacking, while frozen ones last longer and have an almost ice cream-like texture that’s incredible on hot days.

FAQ

Are peanut butter cups keto friendly?

Regular Reese’s peanut butter cups are not keto friendly—they contain 21g carbs per 2-cup serving. However, homemade keto peanut butter cups made with sugar-free chocolate and natural peanut butter have only 2g net carbs per cup, making them perfect for keto diets.

How many carbs are in keto peanut butter cups?

Homemade keto peanut butter cups contain approximately 8g total carbs per cup, with 3g fiber and 3g sugar alcohols, resulting in only 2g net carbs per serving.

How many net carbs in homemade keto peanut butter cups?

Each homemade keto peanut butter cup has 2g net carbs, calculated by subtracting 3g fiber and 3g sugar alcohols from the 8g total carbohydrates per cup. This makes them a perfect low-carb, keto-friendly treat for satisfying chocolate cravings without guilt.

What sweetener is best for keto peanut butter cups?

Powdered erythritol or monk fruit sweetener works best for keto peanut butter cups. They dissolve smoothly into the peanut butter filling without grittiness. Avoid liquid sweeteners as they make the filling too runny.

Can I make keto peanut butter cups without almond flour?

Yes, almond flour is optional. You can skip it for a softer filling, replace it with 1 tablespoon coconut flour, or add cream cheese for firmness. Regardless of the option, the cups remain delicious, creamy, and keto-friendly, perfect for low-carb snacking.

Can I freeze keto peanut butter cups?

Yes, keto peanut butter cups freeze perfectly for up to 3 months. Store them in an airtight container with parchment paper between layers. They can be eaten straight from the freezer or thawed for 2-3 minutes.

How long do homemade keto peanut butter cups last?

Homemade keto peanut butter cups last up to 2 weeks in the fridge and up to 3 months in the freezer. Store them in an airtight container with parchment paper between layers to maintain texture, flavor, and easy portioning for quick, grab-and-go treats.

What’s the difference between keto peanut butter cups and regular Reese’s?

Keto peanut butter cups use sugar-free chocolate and natural peanut butter, containing only 2g net carbs versus 10.5g per regular Reese’s cup. They have more healthy fats, no added sugars, and taste richer due to higher-quality dark chocolate.

Final Thoughts

These keto PB cups have become my secret weapon for staying on track. They’re rich enough to satisfy any chocolate craving but clean enough that I don’t feel guilty eating them. Even my husband, who usually isn’t a huge chocolate fan, keeps sneaking these from my kitchen—which I take as the ultimate compliment.

The best part? Once you make your first batch, you’ll realize how easy they are. No thermometer, no tempering, no fancy techniques—just melt, layer, freeze, and enjoy. They’re proof that keto desserts don’t have to be complicated or taste like compromises.

Did you make these keto peanut butter cups? Leave a comment and ⭐⭐⭐⭐⭐ rating below!

Loved this recipe? Find more keto dessert ideas on our hub, including favorites like the Keto Chocolate Mug Cake, No-Bake Keto Cheesecake Bites, and Keto Cottage Cheese Chocolate Mousse!