Asparagus Casserole
intro
Tender fresh spring asparagus baked in rich cheddar cream sauce, topped with buttery crispy panko for a comforting, crowd-pleasing vegetable side.
Ingredients
Steps
Prep asparagus and oven
Preheat your oven to 190°C (375°F), and lightly coat a 20cm (8-inch) square baking dish with nonstick cooking spray. Rinse trimmed asparagus under cool running water, pat completely dry, and cut spears into 5cm (2-inch) diagonal pieces. Arrange half the cut asparagus in a loose, even layer in the bottom of the prepared dish.
Cook the pale roux
Melt 2 tablespoons (30g) of unsalted butter in a small heavy-bottomed saucepan over medium-low heat. Once butter is fully melted and foaming subsides, whisk in 2 tablespoons (16g) of all-purpose flour to form a smooth paste. Cook the roux, whisking constantly, for 2 full minutes until it turns pale golden and gives off a mild nutty aroma, with no dry flour lumps remaining.
Mix the cheese sauce
Slowly stream 240ml (1 cup) of whole milk into the roux, whisking nonstop to prevent lumps from forming. Increase heat to medium to bring the sauce to a gentle simmer, then cook for 3 minutes, stirring occasionally, until the sauce thickens enough to coat the back of a metal spoon. Stir in 85g (3/4 cup) of shredded sharp cheddar, 1.5g (1/2 teaspoon) garlic powder, 3g (1 teaspoon) kosher salt, and 0.5g (1/4 teaspoon) black pepper. Stir until cheese fully melts into a smooth sauce, then remove the pan from heat.
Layer casserole base
Pour half of the warm cheese sauce evenly over the first layer of asparagus in the baking dish, spreading gently with a silicone spatula to cover all spears. Top the sauced layer with the remaining cut asparagus, arranging pieces in a loose even layer, then pour the rest of the cheese sauce over top. Spread the top sauce layer to fully cover the asparagus, then sprinkle the remaining 28g (1/4 cup) of shredded cheddar evenly across the surface.
Make crispy panko topping
Melt the remaining 1 tablespoon (15g) of unsalted butter in a small microwave-safe bowl, heating for 20 seconds on high power until fully liquid. Add 30g (1/2 cup) of panko breadcrumbs to the melted butter, and toss until every crumb is evenly coated in butter.
Bake until bubbly
Spread the buttered panko breadcrumbs in a uniform, thin layer across the top of the cheese-covered casserole. Place the dish on the middle rack of the preheated 190°C (375°F) oven, and bake uncovered for 25 to 30 minutes. The casserole is done when the sauce bubbles actively around the dish edges, asparagus pierces easily with a fork, and the panko topping is deep golden and crisp.
Rest before serving
Remove the finished casserole from the oven, and let it rest at room temperature for 5 full minutes to allow the cheese sauce to set slightly. Serve warm as a side dish.
Tips
2.Whisk constantly while adding milk to the roux to prevent lumps; if lumps do form, pour the sauce through a fine-mesh sieve before adding cheese for a perfectly smooth texture.
3.If using extra-thick, mature asparagus spears (wider than 1cm/0.5 inch), blanch them in boiling salted water for 1 minute then shock in ice water before assembling, to ensure even tenderness without overcooking the topping.
OMG this casserole was the star of our Sunday family dinner last night! I was worried my picky 7-year-old would turn his nose up at asparagus but he asked for SECONDS. So creamy, not too heavy, and the crispy topping on top is *chef’s kiss*. Took me exactly 45 minutes total too, perfect for a weeknight when I don’t have hours to cook. 10/10 will be making this for our neighborhood potluck next month!
Game changer. I’ve been making boring steamed asparagus as a side for years and never thought to turn it into a casserole. The creamy sauce is so flavorful I could eat it by the spoonful. Super easy too, I didn’t even have to run to the store for fancy ingredients — everything was already in my pantry and fridge.
Made this for my meal prep for the week and it reheats SO well! I portioned it out into individual containers with grilled chicken and it’s held up perfectly for 4 days in the fridge. Only note is I added a little extra parmesan on top because I’m a cheese fiend, no regrets. Would absolutely make again.
Solid recipe, but I felt like it was missing a little something for my taste. I added a pinch of red pepper flakes and a squeeze of lemon juice before baking and it kicked it up a whole notch. Still super easy to throw together, great base recipe!
My whole household is obsessed! I made this for Easter brunch and every single person asked for the recipe. I was nervous because I’m not the best at baking/casseroles but it was genuinely so easy, no fancy skills required. The crispy fried onion topping is what makes it, don’t skip that part!!!
SO good. I’m a broke college student with basically zero cooking skills and I pulled this off for my roommate’s birthday dinner without burning anything. The instructions were super straightforward, and it looked and tasted like something you’d get at a nice restaurant. Will be adding this to my regular rotation for sure.
I’ve made this three times in the last month for different events and it’s always the first dish gone! Last time I made it I swapped half the heavy cream for Greek yogurt to lighten it up a bit and no one even noticed. Still creamy, still delicious, just a little less rich. Highly recommend for anyone looking for a crowd-pleasing side.
Quick question — can I assemble this casserole the night before and bake it the next day? I’m hosting friends for dinner tomorrow and want to get as much prep done ahead of time as possible so I’m not running around like a crazy person when people show up. The recipe looks amazing, can’t wait to try it!
I made this keto-friendly by using a pork rind crumb topping instead of fried onions and swapping the flour for almond flour in the sauce, and it was INCREDIBLE. My non-keto husband didn’t even notice a difference, he went back for two helpings. Such a versatile base recipe, I’m so glad I found it!
This tastes just like the asparagus casserole my mom used to make for holidays when I was a kid! It’s got that perfect cozy, nostalgic flavor but it’s so much easier than her old recipe that required making the sauce from scratch with a roux that took forever. I’ll be passing this recipe along to my grandkids for sure.
Just pulled this out of the oven and wow, my whole apartment smells amazing! I was a little worried the creamy sauce would be too rich but it’s perfectly balanced with the tender asparagus. I added a little extra garlic because I’m a garlic girl through and through, and it’s chef’s kiss. Can’t wait to dig in!