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Prep Time 20 minutes
Cook Time 50 minutes
Total Time 1 hour 10 minutes
Course Comfort Food, Holiday Dish, Side Dish
Cuisine American, Plant-Based, Vegan Comfort Food
Calories 265 kcal

Ingredients
  

For the Potatoes:

  • 3 lbs yellow potatoes like Yukon Gold, thinly sliced
  • 1 yellow onion finely chopped
  • 3 garlic cloves minced
  • 2 tbsp olive oil or vegan butter
  • 2 cups unsweetened oat milk
  • 1 cup low-sodium vegetable broth
  • 1/2 cup raw sunflower seeds or soaked cashews if no allergy
  • 1/4 cup nutritional yeast
  • 2 tbsp lemon juice
  • 1 tbsp Dijon mustard
  • 1 tsp sea salt
  • 1/2 tsp black pepper
  • 1/2 tsp smoked paprika
  • 1 tsp thyme
  • 1/2 tsp rosemary

For the Herbed Breadcrumb Topping:

  • 1 cup breadcrumbs gluten-free if needed
  • 2 tbsp olive oil
  • 1 tsp dried parsley
  • 1/2 tsp garlic powder
  • Pinch of salt and pepper

Instructions
 

Preheat & Prep

  • Preheat oven to 375°F (190°C) and lightly grease a 9x13-inch baking dish.

Blend the Sauce

  • In a high-speed blender, combine oat milk, broth, sunflower seeds, nutritional yeast, lemon juice, mustard, salt, pepper, smoked paprika, thyme, and rosemary. Blend until smooth and creamy.

Sauté Aromatics

  • In a skillet, heat olive oil over medium heat. Sauté onion and garlic until translucent and fragrant, about 4–5 minutes. Add the blended sauce and simmer for 5 minutes, stirring occasionally.

Layer the Potatoes

  • Place half of the sliced potatoes in the baking dish. Pour over half of the sauce. Repeat with remaining potatoes and sauce.

Bake Covered

  • Cover the dish with foil and bake for 35 minutes.

Make the Breadcrumb Topping

  • While baking, mix breadcrumbs, olive oil, parsley, garlic powder, salt, and pepper in a bowl.

Bake Uncovered

  • Remove the foil, sprinkle the breadcrumb mixture on top, and bake for another 15–20 minutes until the top is golden and bubbly.

Let It Set

  • Allow to rest for 10–15 minutes before serving. This helps the sauce thicken and settle.

Notes

Ingredient Tips & Substitutions
• No Yellow Potatoes? Use russet (more starchy) or red (firmer). See the Potato Swap Guide below.
• Nut-Free? Sunflower seeds make this ultra creamy without cashews.
• No Oat Milk? Use soy or almond milk—just make sure it’s unsweetened and unflavored.
• Gluten-Free? Use gluten-free breadcrumbs and double-check broth labels.
Keyword creamy vegan side dish, dairy-free scalloped potatoes, easy vegan holiday sides, gluten-free vegan casserole, nut-free vegan recipes, oat milk potato bake, plant-based potato casserole, scalloped potatoes without cheese, vegan comfort food, vegan scalloped potatoes
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