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Martha’s Rhubarb Upside Down Cake

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Martha’s Rhubarb Upside Down Cake is a classic spring dessert featuring tender vanilla cake baked over a layer of caramelized rhubarb. Once flipped, the glossy pink topping creates a naturally stunning presentation. This easy rhubarb upside down cake perfectly balances sweet and tart flavors, making it an ideal seasonal treat for gatherings, brunches, or afternoon dessert.

Ingredients

For the Rhubarb Layer:

  • 3 cups fresh rhubarb, trimmed and cut into even pieces

  • ½ cup brown sugar

  • ¼ cup unsalted butter, melted

For the Cake Batter:

  • 1 ½ cups all-purpose flour

  • 1 teaspoon baking powder

  • ½ teaspoon salt

  • ¾ cup granulated sugar

  • 2 large eggs

  • ½ cup milk

  • 1 teaspoon vanilla extract

Instructions

  • Preheat Oven:
    Preheat oven to 350°F (175°C). Grease a 9-inch round cake pan and line the bottom with parchment paper.

  • Prepare Caramel Base:
    In a small bowl, mix melted butter and brown sugar. Spread evenly over the bottom of the prepared pan.
    Arrange rhubarb pieces in a single, even layer over the sugar mixture.

  • Mix Dry Ingredients:
    In a medium bowl, whisk together flour, baking powder, and salt.

  • Prepare Wet Ingredients:
    In a large bowl, beat granulated sugar and eggs until light and fluffy.
    Add milk and vanilla extract, mixing until smooth.

  • Combine:
    Gradually fold the dry ingredients into the wet mixture, stirring just until incorporated.

  • Assemble & Bake:
    Pour batter evenly over the rhubarb layer and smooth the top.
    Bake for 40–50 minutes, or until a toothpick inserted into the center comes out clean.

  • Cool & Invert:
    Cool in the pan for 10–15 minutes. Run a knife around the edges, then carefully invert onto a serving plate while still warm. Remove parchment paper and allow to cool before slicing.

Notes

Thaw and drain frozen rhubarb thoroughly before using.Add sliced strawberries for a sweeter variation.Stir in 1 teaspoon orange zest for a bright citrus note.A 9-inch cast iron skillet may be used for a rustic presentation.For clean slices, allow cake to cool fully before cutting.

Find it online: https://cookibly.com/marthas-rhubarb-upside-down-cake/