Easy Crustless Spinach Quiche

Why You’ll Love This Recipe

Traditional quiche relies on a buttery pastry shell that can be finicky, time-consuming, and heavy. This crustless version delivers everything you love about quiche — the custardy eggs, the melty cheese, the savory fillings — without the rolling, chilling, and blind-baking. It’s naturally gluten-free, low-carb friendly, and endlessly adaptable. Serve it warm from the oven or at room temperature at your next brunch; it’s forgiving either way.

Ingredients

• 10 oz (280 g) frozen chopped spinach, thawed and squeezed very dry (or 12 oz fresh spinach, wilted and drained)

• 6 large eggs

• 1 cup (240 ml) whole milk (or half-and-half for a richer result)

• ½ cup (120 g) sour cream or plain Greek yogurt

• 1½ cups (170 g) shredded cheese — a mix of mozzarella and sharp cheddar works beautifully, or try Gruyère or Swiss

• ½ cup (50 g) grated Parmesan cheese

• 1 small onion (about 1 cup), finely diced

• 2 cloves garlic, minced

• 1 tbsp olive oil or butter, for sautéing

• ½ tsp salt

• ¼ tsp black pepper

• ¼ tsp ground nutmeg (optional but recommended — it’s the classic quiche secret)

• ¼ tsp dried thyme (optional)

Optional add-ins: crumbled bacon, diced ham, sliced mushrooms, roasted red peppers, or chopped sun-dried tomatoes.

Equipment

• 9-inch (23 cm) pie dish or round cake pan

• Large skillet

• Mixing bowl

• Whisk

• Measuring cups and spoons

• Clean kitchen towel or paper towels (for squeezing spinach)

Instructions

Step 1: Preheat and Prep — Intensity: Low

Preheat your oven to 350°F (175°C). Lightly grease a 9-inch pie dish with butter or nonstick spray. If you’d like extra insurance against sticking, line the bottom with a circle of parchment paper.

Step 2: Sauté the Aromatics — Intensity: Low-Medium | Time: 5–6 minutes

Heat the olive oil in a skillet over medium heat. Add the diced onion and cook, stirring occasionally, until soft and translucent, about 4–5 minutes. Add the garlic and cook for 1 minute more, until fragrant. Remove from heat and set aside to cool slightly.

Step 3: Squeeze the Spinach Dry — Intensity: Medium | Time: 3–4 minutes

This is the single most important step. Thawed frozen spinach holds a surprising amount of water, and excess moisture will turn your quiche watery and prevent it from setting. Wrap the spinach in a clean kitchen towel or several layers of paper towels and squeeze firmly until no more liquid drips out. You should end up with roughly 1 cup of dry, compacted spinach. If using fresh spinach, wilt it in the skillet first, then cool and squeeze.

Step 4: Whisk the Custard — Intensity: Low | Time: 2 minutes

In a large mixing bowl, whisk together the eggs, milk, sour cream, salt, pepper, nutmeg, and thyme until completely smooth and uniform in color. Don’t over-aerate — you want a smooth custard, not a frothy one.

Step 5: Combine the Fillings — Intensity: Low | Time: 2 minutes

Stir the squeezed spinach, sautéed onion-garlic mixture, shredded cheese, and Parmesan into the custard. Mix until everything is evenly distributed. If using optional add-ins like bacon or mushrooms, fold them in now.

Step 6: Assemble — Intensity: Low | Time: 2 minutes

Pour the mixture into the prepared pie dish. Spread it evenly with a spatula. Give the dish a gentle tap on the counter to release any trapped air bubbles.

Step 7: Bake — Intensity: Low | Time: 45–50 minutes

Bake on the center rack at 350°F (175°C) for 45–50 minutes. The quiche is done when the center is set and no longer jiggles when you gently shake the pan, and the top is golden with slightly puffed edges. If the top browns too quickly, tent it loosely with foil after the 35-minute mark.

Step 8: Rest Before Slicing — Intensity: None | Time: 10 minutes

This step is non-negotiable. Let the quiche rest for at least 10 minutes before slicing. The custard continues to set as it cools, and resting makes clean, neat slices possible. Serve warm, at room temperature, or chilled.

Time & Intensity Summary

Nutrition Information

Per serving (1 of 6 slices), calculated with whole milk, sour cream, and a mozzarella-cheddar blend. Values are estimates and will vary based on exact ingredients used.