Mashed Potatoes & Mushroom Gravy

Author: Sarah Cobacho

Published: November 1, 2022

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Holiday vegan mashed potatoes and mushroom gravy served in a white bowl

This mushroom gravy will elevate any dish. It’s so delicious and easy to prepare that you’ll never buy pre-made gravy again.

The secret ingredient is the porcini mushroom powder. To make it, add some dried mushrooms to a blender and process until reduced to a powder. It works with any mushroom. Specialty mushrooms can be expensive, and it is a great way to incorporate the taste at a fraction of the cost. I love to have it on hand. It adds a nice umami flavor to any dish. If you can’t find porcini, you can use dried shiitake. They are widely available in the international aisle of most supermarkets or at specialty Asian supermarkets.

Holiday vegan mashed potatoes and mushroom gravy served in a white bowl

Mashed Potatoes & Mushroom Gravy

A savory mushroom gravy paired with fluffy mashed potatoes. The secret ingredient, porcini mushroom powder, adds a unique umami flavor.
Sarah Cobacho (
Prep Time10 minutes
Cook Time20 minutes
Total Time30 minutes
Servings 4



  • 2 tbsp vegan butter or neutral oil
  • 4 tbsp cornstarch
  • 1 tbsp dried porcini mushroom powder
  • ½ tbsp tamari
  • 1 tsp garlic powder
  • 1 tsp onion powder
  • 2 cups vegetable stock
  • ¼ cup oat milk or other plant-based milk

Mashed Potatoes

  • 4 cups peeled and roughly chopped potatoes
  • 1.5 cups oat milk or other plant-based milk
  • ½ cup vegan butter
  • 1 tsp nutmeg
  • salt & pepper to taste


  • For the gravy, heat the butter, cornstarch, porcini mushroom powder, garlic and onion powder in a saucepan over medium-high heat until the butter has melted.
  • Slowly incorporate the vegetable stock, stirring vigorously to remove any clumps. Bring the mixture to a boil until the gravy thickens.
  • Stir in the tamari and milk, and cook for another minute. Remove from the heat and allow to cool down for 5 minutes before serving.
  • For the mashed potatoes, add the potatoes and 1 tsp of salt to a large saucepan, cover with cold water, and bring to a boil. Cook for 10 to 15 minutes until the potatoes are easily pierced with a fork. Drain.
  • Mash the potatoes using a potato masher, leaving a few pieces for texture. In a separate saucepan, heat the milk and butter for 2 minutes on low heat until the butter has melted. Slowly incorporate the liquid into the mashed potatoes, stirring until fluffy. Season with nutmeg, salt and pepper.
COURSE Side Dish
CUISINE American-Inspired
KEYWORDS Easy Dinner, High Protein, Mashed Potatoes, Mushroom Gravy
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