When we think of the Instant Pot, our minds usually gravitate toward heavy stews, fall-off-the-bone ribs, or perhaps a speedy batch of dried beans. It is less common to think of the electric pressure cooker as a tool for delicate, sophisticated brunch fare. However, the Instant Pot is essentially a high-tech steamer, and when it comes to eggs and white fish, steam is a secret weapon.
The Instant Pot Cod and Kohlrabi Frittata is a departure from the dry, sometimes rubbery versions of this dish baked in a traditional oven. By using the “pot-in-pot” method, you create a controlled, moist environment that produces a custard-like texture. The inclusion of cod provides a light, flaky protein base, while kohlrabi—a frequently overlooked gem of the produce aisle—adds a subtle, nutty crunch and a sweetness that mirrors cabbage and broccoli stems.
This dish is intended for those who want a nutrient-dense, high-protein meal without the heavy lifting of standing over a stove. It is clean, vibrant, and visually striking, making it just as suitable for a quiet Tuesday meal prep as it is for a refined Sunday morning spread.
Why This Recipe Works
The marriage of cod and kohlrabi might seem unconventional, but it is deeply rooted in logic. Cod is a mild “canvas” fish; it absorbs the aromatics of the eggs and herbs without overpowering the dish with a “fishy” aroma. Kohlrabi, when sliced thinly, retains a bit of its structural integrity even after pressure cooking, providing a necessary textural contrast to the soft eggs.
From a technical standpoint, the Instant Pot excels here because it prevents the eggs from browning or toughening. In an oven, the edges of a frittata often dry out before the center sets. In the pressure cooker, the entire disk cooks evenly from the outside in, resulting in a consistent, velvety bite every time. Furthermore, it is a “set it and forget it” process that frees up your stovetop for bacon, coffee, or a side of sautéed greens.
Ingredients You’ll Need
To get the best results, look for the freshest white fish available and choose kohlrabi bulbs that are small to medium, as they tend to be sweeter and less woody.
The Foundation
- 6 Large Eggs: Preferably pasture-raised for a rich, golden yolk color.
- 1/4 cup Heavy Cream or Full-Fat Coconut Milk: This adds the necessary fat for a silky mouthfeel.
- 8 oz Cod Fillet: Fresh or thawed. Cut into 1/2-inch cubes.
- 1 medium Kohlrabi bulb: Peeled and sliced into thin matchsticks or small, thin half-moons.
- 1/2 cup Shredded Gruyère or Swiss Cheese: These cheeses melt beautifully and complement the earthiness of the kohlrabi.
Aromatics and Seasoning
- 2 Green Onions: Finely sliced.
- 1 tbsp Fresh Dill: Chopped. Dill is a classic partner for cod and brightens the entire dish.
- 1/2 tsp Sea Salt: Adjust to taste.
- 1/4 tsp Ground White Pepper: Provides a clean heat without the black specks.
- 1/2 tsp Garlic Powder: For a subtle, savory undertone.
For the Pot
- 1 cup Water: For the bottom of the Instant Pot to create steam.
- Unsalted Butter or Avocado Oil: To grease your baking insert.
How to Make Instant Pot Cod and Kohlrabi Frittata
1. Prepare Your Pan
You will need a 6-inch or 7-inch round cake pan (stainless steel or silicone) that fits comfortably inside your Instant Pot on top of a trivet. Grease the bottom and sides of the pan thoroughly with butter or oil.
2. Sauté the Kohlrabi (Optional but Recommended)
While you can put raw kohlrabi directly into the frittata, a quick 3-minute sauté in a skillet with a dash of oil softens the fibers and sweetens the flavor. If you are in a rush, simply slice it very thin (paper-thin) and use it raw; the pressure cooker will do the rest.
3. Mix the Egg Base
In a large mixing bowl, whisk the eggs, heavy cream (or coconut milk), salt, white pepper, and garlic powder. Whisk until the whites and yolks are completely integrated—you want a uniform pale yellow liquid with no translucent streaks.
4. Assemble the Frittata
Place the cubed cod and the sliced kohlrabi into the bottom of your greased pan. Sprinkle the sliced green onions and fresh dill over the top. Pour the egg mixture over the fish and vegetables. Finally, top the whole thing with the shredded Gruyère.
5. The “Pot-in-Pot” Setup
Add 1 cup of water to the inner stainless steel liner of your Instant Pot. Place your trivet (the metal rack with handles) inside. Carefully lower the filled cake pan onto the trivet. Cover the cake pan loosely with a piece of aluminum foil to prevent condensation from dripping onto the surface of your eggs.
6. Pressure Cook
Secure the lid and set the steam release valve to the “Sealing” position. Select Manual/Pressure Cook on High for 10 minutes.
7. Natural Release and Cooling
When the timer beeps, allow the pressure to release naturally for 10 minutes. This slow decline in temperature prevents the eggs from collapsing. After 10 minutes, flick the valve to “Venting” to release any remaining steam. Carefully lift the pan out using the trivet handles.
8. The Finish
Remove the foil. The frittata should be puffed and set in the center. If it seems a little watery on top, that is usually just a bit of steam; you can gently dab it with a paper towel. Let it rest in the pan for 5 minutes before running a knife around the edge and sliding it onto a serving plate.
Smart Tips for Better Results
- Pat the Cod Dry: Before cubing the fish, use a paper towel to remove as much surface moisture as possible. Fish naturally releases liquid when cooked, and you don’t want your frittata to become soggy.
- Whisking Technique: Avoid over-whisking to the point of creating lots of bubbles. Too much air in the eggs will cause the frittata to rise like a soufflé and then deflate sharply, leading to a wrinkled texture.
- The Foil Tent: Ensure the foil is “tented” slightly so it doesn’t touch the cheese, but make sure the edges are crimped so steam stays out.
Common Problems and How to Avoid Them
- The Frittata is Runny: If you open the pot and the center is still liquid, your pan might be thicker than average or the cod was very cold. Simply put the lid back on and cook for an additional 2–3 minutes on High Pressure.
- Rubbery Eggs: This usually happens if you perform a “Quick Release” of the pressure immediately. That sudden drop in pressure causes the air pockets in the eggs to expand and then contract too violently. Always give it at least 10 minutes of natural release time.
- Bland Flavor: White fish and eggs both require adequate seasoning. Don’t be afraid of the salt and herbs. If it tastes flat, a squeeze of fresh lemon juice over the top after cooking will fix it instantly.
Variations You Can Try
- The Smoked Version: Swap the fresh cod for flaked smoked trout or smoked salmon. If using smoked fish, reduce the added salt in the egg mixture by half.
- Dairy-Free: Use full-fat canned coconut milk instead of heavy cream and omit the cheese. Replace the Gruyère with a sprinkle of nutritional yeast for a “cheesy” profile.
- Extra Veggies: You can replace half of the kohlrabi with thinly sliced radishes or baby spinach. Just be sure to squeeze the water out of the spinach first.
- Spice it Up: Add a teaspoon of Dijon mustard to the egg whisking stage for a bit of zing, or top the finished dish with red pepper flakes.
What to Serve With It
Because this frittata is light and elegant, it pairs beautifully with sides that offer a bit of acidity or crunch.
- Citrus Salad: A simple salad of segmented grapefruit and oranges with a drizzle of honey and mint.
- Crusty Sourdough: A thick slice of toasted sourdough with salted butter is the perfect vessel for any leftover egg.
- Roasted Fingerling Potatoes: If you want a heartier meal, small roasted potatoes seasoned with rosemary provide a great earthy balance.
- Drink Pairing: For brunch, a crisp Mimosa or a dry Sauvignon Blanc works well with the delicate cod. For a non-alcoholic option, an iced green tea with lemon is excellent.
How to Store Leftovers and Reheat
Frittatas are world-class leftovers. They can be eaten warm, at room temperature, or even cold from the fridge.
- Storage: Place slices in an airtight container. They will stay fresh in the refrigerator for up to 3 days. I do not recommend freezing this dish, as the texture of both the eggs and the kohlrabi will become spongy upon thawing.
- Reheating: To maintain the texture, reheat in a toaster oven at 300°F until warmed through. If you must use a microwave, use 50% power in 30-second intervals to avoid turning the fish and eggs rubbery.
Approximate Nutrition Per Serving
Yields 4 servings
- Calories: 265 kcal
- Protein: 22g
- Total Fat: 16g
- Carbohydrates: 7g
- Fiber: 2g
Note: These values are estimates based on standard ingredient sizes and are provided for informational purposes only.
Final Thoughts
The Instant Pot Cod and Kohlrabi Frittata is a testament to how modern kitchen tools can simplify sophisticated cooking. It takes the guesswork out of temperature control and rewards you with a dish that is light, nutritious, and undeniably gourmet.
Whether you are trying kohlrabi for the first time or looking for a new way to prepare white fish, this recipe offers a unique flavor profile that is sure to impress. It’s a clean, effortless way to start your day—or end it. Give it a try this week, and you might find that your Instant Pot has a permanent spot on your brunch menu.
