5-Ingredient No-Bake Peanut Butter Oat Cups
When the Barcelona heat hits and the oven is a definite non-starter, but the chocolate craving is absolutely non-negotiable — these are the answer. Five ingredients. No baking. Ready in the time it takes to have a proper conversation.
They live in my freezer at all times, which is either very organised or a sign of a slight peanut butter problem. I prefer to call it strategic snacking.
The combination of natural peanut butter, oats, and sugar-free dark chocolate is genuinely indulgent. They taste like a Reese's cup had a Mediterranean edit and came out considerably better.
*Per USDA FoodData Central
The Swap Snapshot
| Typical Version | The Sugar Swap Version | Sugar per serving* |
|---|---|---|
| Store-Bought Peanut Butter Cups Sweetened peanut butter, milk chocolate, corn syrup, artificial flavours |
5-Ingredient No-Bake Peanut Butter Oat Cups Natural peanut butter, oats, monk fruit, sugar-free dark chocolate |
11g→0.5g |
*Based on USDA FoodData Central values. The Sugar Swap is not medical or nutritional advice.
Ingredients
Serves 10 cups · Scale as needed
- 125g (½ cup) ⇄ natural peanut butter, no added sugar — the swap ⇄ the swap
- 40g (½ cup) rolled oats
- 2 tbsp ⇄ monk fruit sweetener — the sweetener swap ⇄ the swap
- ¼ tsp sea salt
- 100g (3.5 oz) sugar-free dark chocolate, melted
Instructions
- 1
Line a mini muffin tin with 10 paper liners.
- 2
In a medium bowl, stir together the peanut butter, oats, monk fruit, and salt until thick and well combined.
- 3
Spoon the peanut butter mixture into the liners, pressing down firmly to flatten.
- 4
Melt the sugar-free chocolate in 30-second intervals in the microwave, stirring between each, until smooth.
⇄ Swap NoteMonk fruit dissolves beautifully into the peanut butter without needing heat, keeping the centres creamy and perfectly sweet.
- 5
Pour a spoonful of melted chocolate over each peanut butter base, spreading to the edges.
- 6
Optional: sprinkle a tiny pinch of sea salt on top of the wet chocolate.
- 7
Place in the freezer for at least 30 minutes until completely set.
- 8
Store in an airtight container in the fridge or freezer for the best texture.
Why I Made This Swap
Standard peanut butter cups contain around 11g of sugar each, mostly from milk chocolate and sweetened peanut butter. Using natural peanut butter (just peanuts, nothing else) and monk fruit keeps the sweetness without the sugar spike. The oats add fibre that slows digestion, making these genuinely satisfying rather than a snack that leads immediately to another snack.
Common Mistakes
- Using sweetened peanut butter. Check the label. Many "natural" peanut butters still contain added sugar. The ingredient list should say: peanuts. That's it.
- Overheating the chocolate. Chocolate seizes if it gets too hot. Go slowly in the microwave and stop when there are still small lumps — stir them out with residual heat.
- Not pressing the base down firmly. The firmer you press, the better they hold when you bite into them. Use the back of a small spoon.
Storage
Store in the fridge for up to 1 week or the freezer for up to 1 month. Best eaten straight from the fridge.
Nutrition per serving
*Per USDA FoodData Central · Typical version: 11g sugar · The Sugar Swap is not medical or nutritional advice.
Frequently Asked Questions
Can I use almond butter instead?
Absolutely. Any natural nut butter works — almond, cashew, sunflower seed for a nut-free version.
Can I use regular oats?
Rolled oats work best. Quick oats will make the texture a little mushier. Steel-cut won't soften enough.
My chocolate is seizing — help!
Add a teaspoon of coconut oil and stir vigorously. The oil usually brings it back.
