This Cheesy Broccoli Cauliflower Casserole is not only delicious but super quick & easy to make, too! Whether you’re hosting Thanksgiving or need a side dish to bring, this recipe will be a great addition to any Thanksgiving dinner!
Adjust the oven rack to the middle position and preheat to 450 degrees F.
In a medium bowl add the crushed crackers, 4 tablespoons of melted butter, 1/4 cup of shredded cheddar cheese, 1/4 teaspoon salt, and 1/4 teaspoon pepper. Stir to combine and set aside.
In a large dutch oven or heavy-bottomed pot, over medium heat add the remaining 2 tablespoons of butter, garlic, and flour. Stir constantly until golden and fragrant, about 1-2 minutes. Slowly whisk in the cream and broth. Stir in broccoli, cauliflower, dry mustard, 1/2 teaspoon salt, and 1/2 teaspoon pepper. Bring to a boil and then reduce heat to medium-low and simmer covered, stirring occasionally, until broccoli and cauliflower are nearly tender, 5-8 minutes. Remove pot from heat and stir in remaining cheese until incorporated.
Pour mixture into a 9×13-inch, or any other 3-quart baking dish and top with cracker crumbs. Bake for 10-15 minutes, or until crumbs are golden brown and crisp. Cool for 10 minutes before serving.