If you’re wondering how to cook tilapia in the oven without spending hours in the kitchen, you’re in the right place. Tilapia is one of those fish that cooks fast, tastes amazing, and works with almost any seasoning. The best part? You don’t need complicated steps — just a few simple ingredients, an oven, and about 10 minutes.
In this guide, I’ll walk you through an easy method that gives you crispy edges and juicy, tender fish inside. You’ll also get tips on seasoning, baking times, and what to serve with your tilapia.
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Why Oven-Baked Tilapia is So Good
Tilapia is a mild white fish that absorbs flavors beautifully. When baked in the oven, it stays juicy while developing a slightly crisp outside. If you’ve ever pan-fried fish and ended up with a mess, baking is a cleaner, healthier, and almost foolproof method.
Plus, once you know how to cook tilapia in the oven, you can swap seasonings, add herbs, or pair it with endless side dishes.

Ingredients You’ll Need
For this recipe, you need just a handful of ingredients. You can tweak them to suit your taste, but here’s the base version:
- Tilapia fillets (fresh or thawed from frozen)
- Cajun seasoning – for a bold, smoky kick
- Lemon pepper – bright, citrusy, and slightly salty
- Seasoned salt – balanced with herbs and garlic
- Olive oil or cooking spray
- Optional: red pepper flakes for extra spice
Step-by-Step: How to Cook Tilapia in the Oven
1. Dry the Fish
Pat your tilapia fillets dry with paper towels. This helps the seasoning stick better and ensures you get a light crisp on the outside. If you skip this step, excess moisture will steam the fish instead of roasting it.
2. Season Generously
Mix your Cajun seasoning, lemon pepper, and seasoned salt. Taste a pinch before using — some blends can be saltier than others, so you can adjust accordingly. Sprinkle the seasoning over the tilapia fillets, coating both sides evenly. If you want a little heat, add some red pepper flakes.

3. Add Oil
Lightly brush or spray oil over both sides of the fillets. This helps the fish brown nicely in the oven and keeps it moist.
4. Prepare the Baking Tray
Line a baking tray with parchment paper and lightly grease it with cooking spray. This prevents sticking and makes cleanup easier.
5. Bake
Preheat your oven to 400°F (200°C). Place the tilapia fillets on the prepared tray and bake for 10 minutes — no more. Overcooking can make tilapia dry and tough.
6. Check & Serve
When done, the fish should flake easily with a fork. Serve immediately with your favorite sides. Garnish with fresh herbs like thyme or parsley for a touch of color and freshness.
Serving Ideas
Once you’ve mastered how to cook tilapia in the oven, you’ll find endless ways to serve it:
- With mashed potatoes or roasted sweet potatoes
- Alongside steamed vegetables
- On top of a fresh salad
- With a side of rice and a squeeze of lemon juice
Tips for Perfect Oven-Baked Tilapia
- Don’t skip preheating — starting in a hot oven helps create that perfect texture.
- Check doneness early — depending on the thickness of your fillets, cooking time may vary slightly.
- Try different spices — garlic powder, paprika, or dill can also work beautifully.
Why This Recipe Works
It’s fast, simple, and keeps the natural flavor of the fish while adding just enough seasoning. Baking in the oven also means you can make multiple fillets at once without standing over the stove.
Once you know how to cook tilapia in the oven, you’ll never be stuck for a quick, healthy dinner idea again.