My Basket (0)

  • No products in the basket.
Official Ninja Website

Sweet Potato Gratin

Sweet Potato Gratin

Rate this recipe


  • 2 tbsp butter
  • 3 tbsp all-purpose flour
  • 300g whipping cream, warm
  • 2 tsp sea salt
  • 1 tsp pumpkin pie spice
  • 70g water
  • 3 large sweet potatoes, peeled, cut in half, then cut in 1/4-inch-thick half moons
  • 180g grated cheddar cheese, divided
  • 60g chopped walnuts, pecans, or slivered almonds
Prep Time


  1. On your Ninja Foodi, select SEAR/SAUTÉ and set to MD:HI. Select START/STOP to begin. Allow to preheat for 5 minutes

  2. After 5 minutes, add butter to the pot and let it melt, then add flour and stir together until a thick paste (roux) forms

  3. Cook the roux for 2 minutes, then slowly add the warm cream while whisking constantly to evenly combine. The mixture should appear quite thick

  4. Once all the cream is incorporated, add salt and pumpkin pie spice and stir to combine. Then add water, stir, and let the mixture simmer for 3 minutes

  5. Add sweet potatoes to the pot

  6. Assemble the pressure lid, making sure the pressure release valve is in the SEAL position. Select PRESSURE and set to LOW. Set time to 1 minute. Select START/STOP to begin

  7. When pressure cooking is complete, quick release the pressure by carefully moving the pressure release valve to the VENT position. Carefully remove lid when unit has finished releasing pressure

  8. Stir 40g shredded cheese into the sweet potato mixture

  9. Make sure the mixture is flat. Cover top of mixture with remaining cheese and nuts

  10. Close crisping lid. Select GRILL and set the time to 5 minutes. Select START/STOP to begin. Cooking is complete when cheese is melted and golden brown

  11. When cooking is complete, allow the gratin to cool for 10 minutes before serving

Ninja Kitchen

We’re not just about blenders, food processors and coffee machines. We’re hell bent on making sure you get the most out of your Ninja products. We want you to enjoy using them as much as we enjoyed developing them. You’ve landed here because like us you love good food, you also love being able to make deliciously good food quickly and easily. We have contributors from all over the country adding to our growing list of deliciously nutritious recipes. There’s something for every pallet, every whim, every trend and most of all every single one of you. Eating well has never been so easy so come with us on our ‘good food fast’ journey. You’ll be the master of your kitchen, diet and wellbeing, showing off to your friends and family in no time at all with less effort than you’ll care to admit….but don’t worry, your secret’s safe with us. Love Ninja x
Read more posts by Ninja Kitchen