Rhubarb Mallow Cobbler

Back to school. Noah: junior year, sixteen, first chair sax, talking about Iowa State for agricultural engineering. The specificity — not just engineering but agricultural — made me catch my breath. He wants to build tools that help farmers. He wants to do for other Rogers what technology couldn't do for ours.

Emma: freshman year at Roosevelt. Debate team, student council, art club. She arrived with a plan and a PowerPoint and the school hasn't recovered.

Jack turned eleven on September fifteenth. Harvest-themed birthday. Carrot cake from garden carrots. He got seeds, a soil testing kit, and a subscription to Hobby Farms. He critiqued an article on no-till gardening at the table. "They're underestimating the compaction issue." Eleven.

Jack sold at the Des Moines Farmers' Market for the first time. Card table, handwritten sign, quiet authority. Twenty dollars in heirloom tomatoes. He put the cash in a jar labeled "Farm Fund." The Fund is the beginning.

Jack’s twenty dollars went straight into the Farm Fund jar, but the real celebration happened at home that evening—and it called for something tart and sweet and a little old-fashioned, the kind of dessert that feels earned. Rhubarb Mallow Cobbler has been in my back-of-the-recipe-card rotation for years, and with rhubarb from the garden and a kid who just proved he could stand behind a card table and command quiet authority, it felt exactly right. The marshmallow topping is a little unexpected, a little triumphant—just like Jack.

Prep Time: 15 min | Cook Time: 40 min | Total Time: 55 min | Servings: 8

Ingredients

5 cups fresh rhubarb, chopped into 1/2-inch pieces
1 cup granulated sugar, divided
1/4 cup water
1 tablespoon cornstarch
2 cups miniature marshmallows
1 1/2 cups all-purpose flour
2 teaspoons baking powder
1/4 teaspoon salt
1/2 cup cold butter, cubed
3/4 cup whole milk
1 teaspoon vanilla extract

Instructions

Preheat and prep. Preheat your oven to 375°F. Lightly grease a 9x13-inch baking dish and set aside.
Cook the rhubarb filling. In a medium saucepan over medium heat, combine rhubarb, 3/4 cup of the sugar, and the water. Stir in cornstarch. Cook, stirring frequently, for 8–10 minutes until rhubarb softens and the mixture thickens slightly. Pour into the prepared baking dish and scatter marshmallows evenly over the top.
Make the cobbler topping. In a large bowl, whisk together flour, baking powder, salt, and remaining 1/4 cup sugar. Cut in cold butter using a pastry cutter or your fingertips until the mixture resembles coarse crumbs.
Add the wet ingredients. Stir in milk and vanilla just until a soft, shaggy dough comes together. Do not overmix.
Top and bake. Drop spoonfuls of the cobbler dough over the marshmallow-rhubarb layer, covering as much of the surface as possible. Bake for 28–32 minutes, until the topping is golden brown and cooked through and the filling is bubbling at the edges.
Rest and serve. Let the cobbler cool for at least 10 minutes before serving. Serve warm, with a scoop of vanilla ice cream if desired.

Nutrition (per serving)

Rhubarb Mallow Cobbler — The Sweet Reward of Jack’s First Market Day