
Prep the Oven: Preheat your oven to 350°F. Grease a 9×13-inch baking dish.
Sauté the Veggies: In a large skillet, melt 2 tablespoons of the butter. Add the grated carrots and onion. Sauté until just softened (about 5–7 minutes). Stir in the smoked paprika and cayenne pepper, then remove from heat.
Whisk the Custard: In a large bowl, whisk together the eggs, milk, salt, and black pepper until smooth.
Combine: Fold the sautéed carrots and shredded cheddar cheese into the egg mixture until well combined.
Fill the Dish: Pour the mixture into your prepared baking dish and spread it into an even layer.
Add the Topping: Melt the remaining 2 tablespoons of butter and toss with the crumbled Ritz crackers. Sprinkle the buttery crumbs evenly over the top.
Bake: Bake uncovered for 45 to 50 minutes, or until the center is set and the topping is golden brown.
Rest: Let the casserole cool for 5–10 minutes to allow the custard to set before serving.