
Why Make This Recipe
Horseradish Casserole is a delicious and unique dish that brings a delightful kick to your table. It combines creamy mashed potatoes with the bold flavor of horseradish, making it a perfect side dish for gatherings or family dinners. This casserole offers a comforting texture with a crunchy topping, satisfying anyone looking for something different yet familiar.
How to Make Horseradish Casserole
Making Horseradish Casserole is simple and requires just a few steps. With minimal prep time, this dish can easily become a staple in your recipe collection. Here’s how to make it:
Ingredients:
- 2 cups cooked potatoes, mashed
- 1 cup light mayonnaise
- 1/2 cup prepared horseradish
- 1 cup bread crumbs (pre-made or fresh)
- Salt and pepper to taste
- Cooking spray or butter for greasing the dish
Directions:
- Preheat your oven to 350°F (175°C).
- In a big bowl, combine the mashed potatoes, light mayonnaise, and horseradish until everything is well blended.
- Add a pinch of salt and pepper to enhance those flavors.
- Transfer the mixture into a greased casserole dish, spreading it out evenly.
- Top it off with an even layer of bread crumbs.
- Bake for about 25-30 minutes, or until golden-brown on top.
- Serve warm.
How to Serve Horseradish Casserole
Horseradish Casserole is best served warm. It pairs well with roasted meats, grilled fish, or a fresh salad. This dish can also stand on its own as a fulfilling vegetarian option, making it versatile for any meal.

How to Store Horseradish Casserole
To store leftover Horseradish Casserole, allow it to cool completely. Then, cover it tightly with plastic wrap or place it in an airtight container. It can be stored in the refrigerator for up to three days. For longer storage, you can freeze it for up to two months. Just remember to thaw it in the fridge before reheating.
Tips to Make Horseradish Casserole
- Ensure your mashed potatoes are smooth for a creamy texture.
- Adjust the amount of horseradish to suit your taste; add more for a spicier kick.
- Try adding grated cheese to the bread crumbs for an extra layer of flavor.
Variation
If you’re looking to mix things up, consider adding chopped green onions or chives to the potato mixture. You can also substitute the mayonnaise with sour cream for a different flavor profile.
FAQs
Can I make Horseradish Casserole ahead of time?
Yes, you can prepare the casserole a day in advance. Just cover and refrigerate before baking. Add a few minutes to the baking time if you bake it straight from the fridge.
Is it possible to make this dish gluten-free?
Absolutely! Use gluten-free bread crumbs to keep it safe for gluten sensitivities.
Can I use leftover mashed potatoes for this recipe?
Definitely! Leftover mashed potatoes work perfectly and can save you time in the kitchen.

Horseradish Casserole
Ingredients
Casserole Base
- 2 cups cooked potatoes, mashed Ensure potatoes are smooth for best texture.
- 1 cup light mayonnaise Can substitute with sour cream for variation.
- 1/2 cup prepared horseradish Adjust amount to taste.
Topping
- 1 cup bread crumbs (pre-made or fresh) Try adding grated cheese for extra flavor.
Seasoning
- to taste Salt and pepper
For Greasing
- as needed Cooking spray or butter To grease the casserole dish.
Instructions
Preparation
- Preheat your oven to 350°F (175°C).
- In a big bowl, combine the mashed potatoes, light mayonnaise, and horseradish until everything is well blended.
- Add a pinch of salt and pepper to enhance those flavors.
- Transfer the mixture into a greased casserole dish, spreading it out evenly.
- Top it off with an even layer of bread crumbs.
Baking
- Bake for about 25-30 minutes, or until golden-brown on top.
- Serve warm.