Sweet Potato Fries with Vegan Mayonnaise

(+ the secret to make them crunchier)

Sweet Potato Fries with Vegan Mayonnaise

Soups & Sides

2 people + 1 cup mayo (16 tablespoons, +/- 200 ml)

Philips Airfryer XXL or oven, blender

Preparation: 10 minutes – Baking time: 15 minutes or longer – Mayo keeps up until 1 week in the fridge or 3 months in the freezer


Sweet potato fries

  • 2 sweet potatoes (400 g)
  • 2 teaspoons extra virgin coconut oil (or other oil with a high smoking point like avocado oil)
  • 1 teaspoon smoked paprika powder (optional)

Vegan mayonnaise (from my book Keto in 15 Minuten)

  • ¾ cup (120 g) hemp seeds
  • 6 tablespoons (90 ml) almond milk, unsweetened
  • 3 tablespoons (45 ml) fresh lemon juice (or 1 to 2 tablespoons apple cider vinegar)
  • 1 teaspoon Dijon mustard
  • ½ teaspoon sea salt

MCT guacamole

  • 1 ripe avocado
  • 1 tablespoon fresh lemon or lime juice, or more to taste
  • 1 tablespoon MCT oil
  • Black pepper and sea salt
  • Spring onion or chives, finely chopped

Sugar free ketchup

Recipe from my book Keto in 15 Minuten

These Sweet Potato Fries with Vegan Mayonnaise are an excellent source of slow complex carbohydrates that help to nourish your gut flora and give your body plenty of energy, especially after intense exercise.

I usually make them in my air fryer because that way they are a lot healthier and easier to digest than the deep-fried version.

If you use an air fryer instead of a regular oven, the sweet potato fries will also turn out crispier, but there’s another way to make them even more crunchy: toss your sliced fries in arrowroot, tapioca starch or organic non-gmo corn starch before adding the oil. Especially cornstarch works really well to help to get the outsides crispy.

If you prefer crunchy fries it’s also essential that you slice them thinly and you don’t overcrowd the air fryer basket. Arrange them next to each other, not piled on top of each other. If you want to make more, it’s better to bake them in two batches.

Sweet Potato Fries with Vegan Mayonnaise

You can serve the sweet potato fries with any sauces or dips of your choice. I love them with sugar free ketchup (a recipe from my book Keto in 15 Minuten), MCT guacamole and vegan mayonnaise, also a recipe from my newest book.

This vegan mayonnaise is truly unique in its simplicity: no whisking or long list of ingredients needed, just a blender to transform hemp seeds, lemon juice, sea salt, a little mustard and water or almond milk into the creamiest sauce. Makes a great base for ranch dressing or homemade tartar sauce too! Contrary to many vegan mayonnaise recipes, this one is completely sugar free, high in protein and fiber + a source of essential omega 3 fats to lower inflammation.

The guacamole is really satisfying too, thanks to the MCT oil. If you’d love to find out more about our ALL GOOD C8 MCT oil, have a look here.


Sweet potatoes make a great ‘carb-up’ meal when you’ve been eating keto for a while and you feel like your body needs an extra dose of carbohydrates to keep your energy levels up.

I love pairing these sweet potato fries with organic free-range chicken and steamed broccoli or a big salad, an excellent meal to recover faster after intense exercise.

You can also serve them as a Summer meal with Mexican salsa of tomato, cucumber, spring onion, cilantro and lime juice. Tastes great with smoked tofu, stir-fried in extra virgin olive oil, as a vegan protein source.

The sweet potato fries also make a great vegan side dish for Thanksgiving or other holiday parties!

Enjoy :)
x Julie

Sweet Potato Fries with Vegan Mayonnaise

Sweet Potato Fries with Vegan Mayonnaise


Sweet Potato Fries

  1. Preheat the air fryer (or oven) to 380/400°F (depending on how golden brown / crispy you want them).
  2. Wash the sweet potatoes to remove any dirt (if it’s organic, there’s no need to peel it) and dry with a kitchen towel or paper towel. Cut the potatoes into thin fries as you would with regular potatoes.
  3. Put the fries in a bowl and mix with some melted coconut oil (or another heat proof oil with a high smoking point such as avocado oil). Add smoked paprika and/or sea salt if desired, and give the fries a good toss with your hands (or a spoon) to make sure each sweet potato fry is covered with the spices and oil.
  4. Put the marinated fries in the air fryer basket, give it a good shake so they are spread out, and bake until golden brown for 15 minutes or longer. Shake the basket half-way through to make sure the fries don’t burn.
  5. Serve with dips of your choice.

Vegan mayonnaise

Blend all ingredients until smooth.

MCT guacamole

  1. Mash the avocado with a fork. Season with lemon juice, sea salt and black pepper.
  2. Add MCT oil and finely chopped chives or spring onion. Tastes great with chopped cherry tomatoes and fresh chili pepper too.

Sweet Potato Fries with Vegan Mayonnaise


  • Try to cut the fries in roughly the same size for the best result.
  • Don’t overcrowd the air fryer basket. If you want to make more, it’s better to cook your fries in batches, otherwise they won’t get crispy.
  • Shake the basket half way through so the fries bake evenly. Make sure they don’t burn.
  • You can replace the smoked paprika with other spices such as curry powder, ras el hanout… or just sea salt.
  • I love this recipe with other root vegetables such as parsnip or parsley root too.

Do you ever cook with an air fryer? What do you use it for?

Would you like to see more air fryer recipes on the blog?

Let me know by leaving a comment down below.

Sweet Potato Fries with Vegan Mayonnaise

Nutritional value sweet potato fries (per person)
Carbohydrates 34.2 g, Protein 3.1 g, Fats 4.6 g, Calories 211.8 kcal

Nutritional value MCT guacamole (per serving = ½ recipe)
Carbohydrates 1.8 g, Protein 1.4 g, Fats 17.5 g, Calories 180 kcal

Nutritional value vegan mayonnaise (per tablespoon)
Carbohydrates 0.5 g, Protein 2.4 g, Fats 3.8 g, Calories 44 kcal

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