Food & Cooking Recipes Main Dish Recipes Casserole Recipes Green Bean Casserole 3.5 (425) 13 Reviews By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on February 23, 2021 Print Share Share Tweet Pin Email Prep Time: 35 mins Total Time: 50 mins Servings: 8 We've made the quintessential Thanksgiving casserole better than ever by combining fresh green beans, homemade mushroom sauce, and savory fried shallots. Ingredients 3 cups vegetable oil 6 large shallots, cut into very thin rounds, rings separated 1 ½ cups all-purpose flour Coarse salt and ground pepper 2 pounds green beans, trimmed and halved ¼ cup (½ stick) unsalted butter 1 pound button mushrooms, trimmed and coarsely chopped 14 ½ ounces low-sodium chicken broth 1 cup whole milk Directions Preheat oven to 425 degrees. In a large skillet, heat oil over medium. Line a baking sheet with paper towels. In a large bowl, toss together shallots and 1 1/4 cups flour until shallots are evenly coated. In batches, shake off excess flour from shallots and fry until golden and crisp, about 5 minutes, adjusting heat if shallots are browning too quickly. With a slotted spoon, transfer to sheet and season with salt. Set aside. (Store in an airtight container at room temperature with a layer of paper towels underneath, up to 2 days.) In a large pot of boiling salted water, cook green beans until crisp-tender, 6 minutes. Drain and rinse with cold water to stop the cooking. Pat dry. (To store, refrigerate in a resealable plastic bag, up to 1 day.) In a large saucepan, melt butter over medium-high. Add mushrooms and cook until liquid has evaporated, about 7 minutes. Season with salt and pepper. Add 1/4 cup flour and cook, stirring, until incorporated, about 1 minute. Whisking constantly, gradually add broth, then milk. Bring to a simmer. Cook, stirring occasionally, until sauce thickens, about 5 minutes. Season with salt and pepper. (To store, refrigerate with plastic wrap on surface, up to 2 days. Reheat before using.) Add green beans to mushroom sauce and toss to coat. Transfer mixture to a 9-by-13-inch baking dish. Bake until bubbling around edges, about 15 minutes. Serve topped with fried shallots. Print