Broccoli 3-Cheese Impossible Quiche

Broccoli 3-Cheese Impossible Quiche is one of those super-simple and super delicious recipes. If you love quiche but are tired of the same old ham and cheese, this modernized version is for you! It’s loaded with broccoli and sharp cheese, and because it’s impossible quiche, there’s no pie crust to worry about!

It’s impossible to describe to you how good and how easy impossible quiche is, but I’ll give it a shot! This Broccoli 3-Cheese Impossible Quiche is a quick and easy quiche that doesn’t need any pie crust. The secret ingredient is Bisquick, and while the quiche is baking, the Bisquick falls to the bottom of the quiche to form a custardy-biscuit-like bottom.

The rest of the quiche, the eggy custard, broccoli, and miles of cheese stays on the top of the quiche, so you can really see the different layers.

And boy oh boy, is this quiche ever good! All the best broccoli and cheese flavors are in this quiche which is perfect for breakfast, brunch, or even dinner! You can eat it hot from the oven, cold from the fridge, or pop a slice into your lunch and enjoy it for your midday meal.

Impossible quiche is impossibly good AND easy!

Ingredients

• Broccoli florets – Fresh broccoli works best in this recipe. Frozen broccoli releases too much water and will make the pie soggy. Cut into small, even florets so they cook through.
• Sharp cheddar cheese, shredded – I recommend shredding your own cheese. Pre-shredded cheese is coated with anti-caking agents that make it gritty and prevent smooth melting.
• Mozzarella cheese, shredded – Shred it yourself for best melting. Low-moisture mozzarella works best, as fresh mozzarella has too much water.
• Parmesan cheese, grated – Grate it yourself from a block. Pre-grated Parmesan in a can is dry and won’t distribute or melt properly.
• Onion, fresh, finely chopped – Yellow or white onion works. Red onion is too sweet for this dish. Chop fine so it cooks evenly.
• Milk – Whole milk works best. Low-fat or skim milk will make the pie less rich.
• Heavy whipping cream – Don’t substitute with half-and-half or milk. The pie won’t be as rich and silky.
• Eggs – Large eggs. Extra large works without adjustment. Whisk well to incorporate air for a lighter texture.
• Bisquick – Original Bisquick works best. Don’t substitute with pancake mix, as it has more sugar and will throw off the flavor.
• Mustard powder – Ground mustard powder. Don’t substitute with prepared mustard, as it’ll make the pie watery and won’t distribute the same way.

You’ll also need

• Pie dish – A large, deep pie dish.
• Baking sheet – With raised sides.
• Nonstick cooking spray

How To Make The Best 3-Cheese Broccoli Impossible Quiche

Scroll down for the full recipe card with exact measurements and printable instructions.

Start by preheating your oven to 400°F and spraying a pie dish with non-stick cooking spray. Place the pie dish on a baking sheet and set aside.

Chop the broccoli florets into small, bite-sized pieces and add them to a large mixing bowl.

Add the cheddar cheese, mozzarella cheese, Parmesan cheese, and chopped onion to the bowl with the broccoli. Toss everything together until well combined.

In a separate bowl, whisk together the eggs, milk, heavy whipping cream, mustard powder, and Bisquick until the mixture is smooth and evenly blended.

Pour the egg mixture over the broccoli and cheese mixture, then stir well to combine.

Transfer the mixture to the prepared pie dish. If any broccoli pieces are floating on top, gently press them down into the batter.

Place the baking sheet with the pie dish into the oven and bake for about 1 hour, or until the quiche is evenly puffed and fully set in the center.

Remove the quiche from the oven and allow it to cool slightly before slicing.

Cut into portions, serve, and enjoy!

Chef Jenn’s Tips

• Bake your quiche on a baking sheet with raised sides in case it spills on the way into the oven or in case it spills a bit while cooking.
• Don’t overfill your pie dish!
• If the top of your quiche gets too brown while baking, cover the top loosely with a sheet of foil.
• You can use some broccoli stem in this recipe, just chop them smaller than the florets.
• Mix and match the cheeses – use your favorite cheeses instead of the cheddar, mozzarella, and Parmesan.

Make It A Meal

The nice thing about quiche is that it is more or less full meal; you can easily just have a slice of quiche and be on your way. However, if you’re wondering about what to serve with Broccoli 3-Cheese Impossible Quiche, here are some suggestions. Home fried potatoes are a great pick and is a filling side dish, or serve your quiche with a tasty Bacon, Cheddar, Green Onion Scone or Ham and Cheese Turnover.

Storage

Store any leftover quiche in an airtight container in the fridge for 3-4 days. You can enjoy the leftovers cold, at room temperature, or reheat them in the microwave or oven.