Food & Cooking Recipes Breakfast & Brunch Recipes Plum-Jam Crumb Cake 4.0 (1) 1 Review By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on March 14, 2018 Print Rate It Share Share Tweet Pin Email Prep Time: 20 mins Total Time: 3 hrs 30 mins Servings: 16 Ingredients Topping 1 cup all-purpose flour ⅓ cup packed light-brown sugar ¼ teaspoon coarse salt 6 tablespoons unsalted butter, melted Cake 1 ½ sticks (¾ cup) unsalted butter, room temperature, plus more for pan 2 cups all-purpose flour 2 teaspoons baking powder ¾ teaspoon coarse salt ¾ cup granulated sugar 2 large eggs, room temperature ⅔ cup whole milk, room temperature 1 ½ cups Plum Jam, skins removed (1 ¼ cups) Directions Topping: Preheat oven to 350 degrees. Whisk together flour, brown sugar, and salt in a small bowl. Stir in butter until combined. Cake: Brush a 9-by-9-by-2-inch square cake pan (not nonstick) with butter. Line with parchment, leaving a 2-inch overhang on two sides; butter parchment. Whisk together flour, baking powder, and salt in a medium bowl. In another bowl, beat butter with granulated sugar on medium-high speed until light and fluffy, about 2 minutes. Add eggs, one at a time, beating to combine after each. Reduce speed to low and add flour mixture in 3 batches, alternating with 2 additions of milk, beating until combined and scraping down bowl as necessary. Transfer batter to prepared pan. Spread jam evenly over top. Sprinkle evenly with topping, squeezing to create large clumps. Bake until a tester inserted in center comes out clean, 45 to 50 minutes. Let cool in pan on a wire rack 20 minutes. Use parchment to lift cake out of pan, then let cool completely on rack before serving. Christopher Testani Rate it Print