Instant Pot Sausage and Potato Casserole Recipe

Get ready to fall in love with your Instant Pot all over again! This Instant Pot Sausage and Potato Casserole is pure comfort in a bowl—cheesy, creamy, and loaded with hearty potatoes and smoky sausage. Whether it’s a busy weeknight or a lazy weekend, this one-pot wonder is the easiest (and tastiest) way to feed your family in under 30 minutes.

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Ingredients You’ll Need

There’s nothing fancy here—just humble, hearty ingredients coming together to create pure dinnertime magic. Each one plays a role in flavor, color, and creamy texture. Here’s what you’ll need for this Instant Pot Sausage and Potato Casserole (and a few pro tips for the best results):

• Fresh diced potatoes (1 1/2 lb or 700g): Russet or Yukon Gold potatoes work beautifully, keeping their shape and turning ultra-creamy.
• Kielbasa sausage (1 lb or 450g): Smoky, hearty, and quick-cooking—slice it into bite-sized pieces for the best distribution.
• Small onion (diced): Adds a subtle sweetness and foundation flavor that ties the casserole together.
• Garlic cloves (2 or 3, minced, optional): For a savory, aromatic boost—totally optional if you’re in a hurry.
• Shredded cheddar cheese (2 1/2 cups): The star that creates all that gooey, cheesy goodness—feel free to mix in some Monterey Jack if you’re feeling adventurous!
• Chicken or vegetable stock (1 1/2 to 2 cups): Brings moisture and lifts up all the flavors—choose low-sodium if you want more salt control.
• Milk (1/2 cup): The secret to a creamy, luscious base without being too heavy.
• Heavy whipping cream (1/4 cup): For that ultra-silky, dreamy texture (trust me, you’ll notice!).
• Unsalted butter (1/2 tablespoon, diced): A little butter gives the potatoes richness you can taste in every bite.
• Italian seasoning (1 teaspoon, optional): Adds a subtle herby warmth—skip it if you want to keep things simple.
• Cayenne pepper (1/2 teaspoon, optional): A pinch brings gentle heat and balances the richness—but use according to your family’s spice preferences.
• Salt and pepper (to taste): Bring everything together and adjust seasoning at the end for best results!

Variations

The real magic of this Instant Pot Sausage and Potato Casserole is how adaptable it is! Feel free to customize with what’s in your fridge or match it to your family’s cravings—here are some reader-tested favorites to inspire your next batch:

• Swap the Sausage: Try spicy andouille, chicken sausage, or even vegetarian sausage for a totally new flavor profile.
• Switch Up the Cheese: Substitute sharp cheddar with smoked gouda, pepper jack, or a Mexican cheese blend for a twist.
• Add Veggies: Stir in chopped bell peppers, frozen peas, or baby spinach just before serving for extra color and nutrition.
• Make it Gluten-Free: Double-check your sausage and stock, and you’re good to go—this recipe is naturally gluten-friendly!

How to Make Instant Pot Sausage and Potato Casserole

Step 1: Layer the Instant Pot

Start by adding your diced potatoes, sliced kielbasa, diced onion, and butter right into your Instant Pot. Try to use a 6-quart Instant Pot (or larger) so you have enough room to stir—this prevents sticking and those pesky “burn” warnings.

Step 2: Prepare the Creamy Mixture

In a separate bowl or large measuring cup, whisk together your chicken or veggie stock, milk, heavy whipping cream, minced garlic (if using), Italian seasoning, cayenne, and a good pinch of salt and pepper. Pour this luscious mixture evenly over the potatoes and sausage in the pot—it’ll help everything cook up flavorful from the inside out!

Step 3: Sprinkle and Cook

Give everything a gentle mix (careful not to mash the potatoes), then sprinkle the shredded cheddar cheese across the top. Lock the Instant Pot lid, set it to “Stew” or “Manual” for 8–10 minutes, and let it work its magic. The casserole is ready when the potatoes are fork-tender and the cheese is gloriously melty.

Step 4: (Optional) Crisp Under the Broiler

If you’re a crispy cheese fan (who isn’t?), transfer everything to a baking dish and pop it under the broiler for 2 minutes. That golden, bubbly top is everything you want in a comfort food casserole. Serve your Instant Pot Sausage and Potato Casserole hot and steamy, right away—happiness guaranteed.

How to Serve Instant Pot Sausage and Potato Casserole

Garnishes

Take your casserole to the next level in seconds! Try a sprinkle of fresh chopped parsley or chives for color and fresh flavor, dollop a little sour cream for cool creaminess, or add a dusting of paprika for that irresistible pop of color.

Side Dishes

This Instant Pot Sausage and Potato Casserole is practically a complete meal, but it’s extra satisfying with a crisp green salad, steamed broccoli, or some warm crusty bread to soak up all that amazing sauce. If you’re feeling indulgent, serve with a tangy slaw or roasted green beans for crunch.

Creative Ways to Present

Make dinner extra fun by scooping the casserole into individual ramekins for a dinner party vibe, or serve it “family-style” straight from the pot for a big, cozy gathering. For potlucks, transfer to a slow cooker set to warm—everyone can help themselves (and it stays gooey and perfect for hours!).

Make Ahead and Storage

Storing Leftovers

If you’re lucky enough to have leftovers, let your casserole cool to room temperature, then store it in an airtight container in the fridge for up to 3 days. The flavors deepen overnight, making it even more delicious the next day!

Freezing

Yes, you can freeze your Instant Pot Sausage and Potato Casserole! Divide into single servings, wrap well, and freeze for up to 2 months. Thaw in the fridge overnight for best texture—cheese-based casseroles may lose a little creaminess but are still ultra-satisfying.

Reheating

Reheat individual portions in the microwave or pop the whole casserole in a 350°F oven, covered with foil, until hot and bubbly. Add an extra sprinkle of cheese before reheating if you love it extra gooey!

FAQs

Final Thoughts

There’s just nothing better than watching your loved ones dig into a bubbling, cheesy casserole made with everyday ingredients—especially when it’s as easy as pressing a button! Treat your family (or yourself!) to the simple comfort of this Instant Pot Sausage and Potato Casserole and don’t be surprised when it becomes a regular request at your dinner table.

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