These no-bake peanut butter protein bars are for anyone who wants a real, satisfying snack that does some work — whether you train in the evening, skip lunch more often than you’d like, or just need something steadier than a biscuit at 4pm. They come together in one bowl in about 15 minutes, travel well in a lunchbox, and deliver a genuine 21g of protein per bar to help with muscle repair and staying full. Eat one within an hour or two of a workout, or pair it with a piece of fruit for a balanced mid-morning bite.
Serves 10 · Time about 15 min · Style High-protein
Ingredients
- 200 g rolled oats
- 120 g vanilla whey or plant protein powder (about 4 scoops)
- 180 g natural peanut butter (no added sugar or palm oil)
- 120 ml honey or maple syrup
- 60 ml semi-skimmed or unsweetened soya milk, plus a little extra if needed
- 1 tsp vanilla extract
- Pinch of salt (omit if your peanut butter is salted)
- 30 g dark chocolate, melted, to drizzle (optional)
Method
- Line a 20 cm square tin with baking paper, leaving an overhang so you can lift the slab out later.
- In a large bowl, stir together the rolled oats, protein powder and salt.
- Gently warm the peanut butter and honey together — 20 seconds in the microwave or in a small pan over low heat — until loose and pourable, then stir in the vanilla.
- Pour the wet mixture over the dry ingredients and mix well. Add the milk a splash at a time until the mixture is thick but holds together when pressed; it should feel like firm dough, not wet batter.
- Tip into the tin and press down very firmly with the back of a spoon or a second sheet of baking paper — compacting it well is what keeps the bars from crumbling.
- Drizzle with the melted dark chocolate if using, then chill for at least 1 hour until set.
- Lift out using the paper overhang and cut into 10 bars.
Nutrition per serving
| Energy | Protein | Carbs | Fat | Fibre |
|---|---|---|---|---|
| 233 kcal | 21 g | 17 g | 9 g | 3 g |
Dietitian’s tip
Keep these in an airtight container in the fridge for up to 5 days, or freeze them individually wrapped for up to 3 months — handy for batch-prepping a week of post-workout snacks. If you find them dry, it’s usually the protein powder; different brands absorb liquid differently, so add milk gradually and stop as soon as the dough holds together. For a higher-fibre version, swap 50 g of the oats for ground flaxseed, which also adds plant omega-3s.
General guidance, not individual medical advice. For personalised nutrition, see a registered dietitian.