Go Back
–+ servings
These blue mashed potatoes use a delicious natural coloring you can get anywhere. Perfect for July 4th.
Print

Blue Mashed Potatoes

With Independance Day coming up, these blue mashed potatoes will wow your guests, both with their creamy buttery flavor and their patriotic hue. Oh yea... and did I mention they're BLUE?
Course Sides
Cuisine American, Irish
Level Beginner
Main Ingredient Potato, Vegetable
Diet Gluten-Free, Low Sugar, Pescatarian, Vegetarian
Prep Time 5 minutes
Cook Time 30 minutes
Total Time 35 minutes
Servings 4 servings
Calories 251kcal

Ingredients

  • 600 grams potatoes
  • 120 grams red cabbage (tough stems removed)
  • 1 cup milk
  • ½ teaspoon salt
  • 50 grams cultured unsalted butter
  • ⅛ teaspoon baking soda
Grams + US Cups - US Standard

Instructions

  • Boil the 600 grams potatoes skin-on until you can easily slide a toothpick through one.
    600 grams potatoes
    Boil the potatoes for the blue mashed potatoes.
  • Slice the 120 grams red cabbage into thin strips and then add them to another pot, along with the 1 cup milk and ½ teaspoon salt, and bring the mixture to a boil.
    120 grams red cabbage, 1 cup milk, ½ teaspoon salt
    Boil the red cabbage in milk to extract the color for the blue mashed potatoes.
  • Turn down the heat and simmer until the cabbage is very tender and the milk is a vibrant purple (about 20-25 minutes).
    The milk for the blue mashed potatoes is done when it's a vibrant purple and the cabbage is tender.
  • Add ⅛ teaspoon baking soda a little bit at a time until the mixture reaches your desired shade of blue. Don't add more than ⅛ teaspoon though as too much will make your mashed potatoes taste metallic. Add the 50 grams cultured unsalted butterand melt.
    ⅛ teaspoon baking soda, 50 grams cultured unsalted butter
    Add the baking soda to the milk. This turns the color from purple to blue.
  • When the potatoes are tender, mash them.
    Mash the potatoes, or pass them through a potato ricer.
  • Add the blue cabbage and milk mixture to the potatoes and stir everything together until the blue mashed potatoes are creamy and uniform in color.
    Stir-in the blue cabbage and milk mixture to turn the mashed potatoes blue.

Nutrition

Calories: 251kcal | Carbohydrates: 31g | Protein: 6g | Fat: 12g | Saturated Fat: 8g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.4g | Cholesterol: 34mg | Sodium: 367mg | Potassium: 799mg | Fiber: 4g | Sugar: 5g | Vitamin A: 749IU | Vitamin C: 47mg | Calcium: 110mg | Iron: 1mg