If you’re searching for a vibrant, flavour-packed keto side that’s ready in minutes, these Air Fryer Bell Peppers with Garlic Herb Butter are a must-try. Bell peppers are naturally low in carbs and high in vitamin C, making them an ideal choice for keto. Air frying intensifies their sweetness and gives them a deliciously tender texture, while the garlic herb butter adds richness and depth.
Perfect for busy weeknights or meal prep, this recipe uses just a handful of ingredients and minimal prep. Simply slice the peppers, toss with olive oil and seasoning, then air fry until caramelised and soft. Finish with a dollop of homemade garlic herb butter for a restaurant-quality touch.
Serve these peppers alongside grilled meats, toss them into salads, or enjoy as a colourful snack. They’re endlessly versatile, packed with flavour, and sure to become a staple in your keto kitchen.
At a glance
- Time: 18 minutes
- Difficulty: Easy
- Servings: 2
- Cost: Affordable
Macros (per serving)
- Protein: 2 g
- Fat: 13 g
- Carbs: 6 g
- Energy: 140 kcal
Ingredients
- 3 medium (about 400g) Bell peppers (Mixed colours for best flavour)
- 1 tbsp Olive oil
- 1/2 tsp Sea salt (Or to taste)
- 1/4 tsp Black pepper
- 30g Butter (Unsalted)
- 1 clove Garlic (Finely minced)
- 1 tbsp Fresh parsley (Chopped)
Equipment Needed
- Air fryer
- Sharp knife
- Chopping board
- Mixing bowl
- Small bowl
- Spoon
Steps
- Slice the bell peppers into 2cm-wide strips, discarding seeds and stems.
- In a mixing bowl, toss the pepper strips with olive oil, sea salt, and black pepper until evenly coated.
- Preheat your air fryer to 200°C for 2 minutes.
- Spread the peppers in a single layer in the air fryer basket. Cook at 200°C for 10–12 minutes, shaking halfway, until edges are caramelised and peppers are tender.
- While the peppers cook, combine softened butter, minced garlic, and chopped parsley in a small bowl. Mix well to form a flavoured butter.
- Transfer hot peppers to a serving plate and immediately top with dollops of garlic herb butter. Let it melt over the peppers.
- Gently toss or leave as is, then serve warm.
Allergens & Swaps
Allergens:
Recipe contains: dairy
Potential swaps:
- Butter → Dairy-free vegan butter — For a dairy-free version
- Parsley → Coriander or basil — Use your favourite fresh herb
Serving Ideas
- With grilled chicken – for a balanced, protein-rich meal.
- Tossed into a leafy green salad – adds colour and flavour.
- Alongside steak or fish – a vibrant, low-carb side.
Additional Info
Chefs Tips
- Slice peppers evenly for consistent cooking.
- Don’t overcrowd the air fryer basket—cook in batches if needed.
- Let the garlic herb butter melt over hot peppers for maximum flavour.
Variations
- Add a pinch of smoked paprika or chilli flakes for a spicy kick.
- Top with crumbled feta or goat cheese for extra richness (if dairy is tolerated).
Troubleshooting
- If peppers are too soft, reduce cooking time by 2–3 minutes.
- If not caramelised, increase temperature to 210°C for the last 2 minutes.
Storage & Reheating
Store cooled peppers in an airtight container in the fridge. Reheat in the air fryer for best results.
- Fridge: up to 3 days
- Freezer: up to 0 months
- Reheat: Air fry at 180°C for 3–4 minutes until hot.
Ingredient Spotlight
Bell peppers: Rich in vitamin C and antioxidants, bell peppers add natural sweetness and colour with minimal carbs.
Olive oil: A heart-healthy fat that helps caramelise the peppers and enhances flavour.
Garlic: Adds aromatic depth and pairs beautifully with fresh herbs.
FAQs
Can I use frozen bell peppers?
Yes, but thaw and pat them dry first. They may be softer and release more moisture, so reduce cooking time slightly.
How do I store leftovers?
Cool completely, then refrigerate in an airtight container for up to 3 days. Reheat in the air fryer for best texture.
Can I make this recipe dairy-free?
Absolutely! Use a dairy-free vegan butter alternative for the garlic herb butter.
What other herbs work well?
Try basil, coriander, chives, or thyme for a different flavour profile.
Are bell peppers keto-friendly?
Yes, bell peppers are low in net carbs and suitable for keto when enjoyed in moderation.
Air Fryer Bell Peppers with Garlic Herb Butter – Quick Keto Side
Ingredients
- 3 medium (about 400g) Bell peppers (Mixed colours for best flavour)
- 1 tbsp Olive oil
- 1/2 tsp Sea salt (Or to taste)
- 1/4 tsp Black pepper
- 30g Butter (Unsalted)
- 1 clove Garlic (Finely minced)
- 1 tbsp Fresh parsley (Chopped)
Instructions
- Slice the bell peppers into 2cm-wide strips, discarding seeds and stems.
- In a mixing bowl, toss the pepper strips with olive oil, sea salt, and black pepper until evenly coated.
- Preheat your air fryer to 200°C for 2 minutes.
- Spread the peppers in a single layer in the air fryer basket. Cook at 200°C for 10–12 minutes, shaking halfway, until edges are caramelised and peppers are tender.
- While the peppers cook, combine softened butter, minced garlic, and chopped parsley in a small bowl. Mix well to form a flavoured butter.
- Transfer hot peppers to a serving plate and immediately top with dollops of garlic herb butter. Let it melt over the peppers.
- Gently toss or leave as is, then serve warm.
Allergens & Swaps
Allergens: dairy
- Butter → Dairy-free vegan butter — For a dairy-free version
- Parsley → Coriander or basil — Use your favourite fresh herb
Nutrition (per serving)
- Protein: 2 g
- Fat: 13 g
- Carbs: 6 g
- Energy: 140 kcal
