How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Crab Au Gratin?

You need 10 ingredients. The key ingredients include: 8 Tbsp. butter (1 stick), 1/2 c. onion, minced, 2 Tbsp. all-purpose flour, 1 c. milk, scalded, and more.

Is Crab Au Gratin suitable as seafood?

Yes, Crab Au Gratin falls under the Seafood category and is a great choice for this type of meal.

How do I store leftover Crab Au Gratin?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Crab Au Gratin Recipe

Name: Crab Au Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 8 Tbsp. butter (1 stick); 1/2 c. onion, minced; 2 Tbsp. all-purpose flour; 1 c. milk, scalded; 1/2 tsp. salt; Dash of white pepper; 1/4 c. sherry; 12 oz. crab meat; 1 c. crackers, finely crumbled; 1/2 c. cheddar cheese, finely grated

Try this homemade Crab Au Gratin recipe the whole family will love. Made with butter, onion, flour and milk. Easy step-by-step instructions included.

This Crab Au Gratin relies on simple, everyday ingredients such as butter (1 stick), onion, minced, all-purpose flour and milk, scalded. It comes together quickly and makes 4 servings, at about 397 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Seafood

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
A good 1:1 gluten-free flour blend works well if you need a gluten-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Crab Au Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

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