Costco is chock-full of delicious items with its crab dip being among the best. Turns out, you can easily recreate it using just two easy-to-find ingredients.

Sauté 3–5 minutes or until vegetables are wilted. Stir in tarragon, 1 cup spinach and artichoke. Sauté an additional 3 minutes. Add flour, stirring to mix. Slowly add shellfish stock ...