Strawberry Rhubarb Cupcakes

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Strawberry Rhubarb Cupcakes
"Soft and moist cupcakes flavored with almond extract, filled with homemade rhubarb custard and topped with fluffy strawberry buttercream"
-- @curlygirlkitchen
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Prep time: 30mins
Cook time: 18mins
Serves or Makes: 24

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ingredients

Rhubarb Custard

  • 6 ounces chopped rhubarb, fresh or frozen
  • 1/3 cup granulated sugar
  • 1 tablespoon water
  • 1 cup whole milk
  • 1 tablespoon corn starch
  • 1/4 cup heavy whipping cream
  • 3 egg yolks
  • 1 teaspoon vanilla extract
  • 2 tablespoons cold, unsalted butter
  • 2-3 drops pink food coloring, if desired

ingredients

Cupcakes

  • 2 3/4 cups cake flour or all-purpose flour
  • 1 3/4 cups granulated sugar
  • 1 1/4 teaspoons baking soda
  • 1 1/4 teaspoons baking powder
  • 1 teaspoon coarse Kosher salt
  • 3 large eggs
  • 1 1/2 cups whole milk
  • 1 cup full-fat sour cream
  • 1 teaspoon almond extract

ingredients

Strawberry Buttercream

  • 1 1/2 cups unsalted butter, softened to room temperature
  • 1/4 cup good-quality strawberry jam
  • 3 cups powdered sugar
  • 1 tablespoon meringue powder (optional)
  • 1/4 teaspoon coarse Kosher salt
  • 1 teaspoon vanilla extract

Method

Custard

  • Step 1

    In a saucepan, combine the rhubarb, sugar and water. Simmer over medium heat until the fruit is softened, and the liquid is syrupy and nearly evaporated. Scrape the rhubarb into a blender, and add the milk and corn starch; pulse several times until smooth. Scrape the blended mixture back into the saucepan, and whisk in the cream and egg yolks. While whisking constantly, bring the mixture to a boil over medium heat, then boil for one minute until thickened. Remove from the heat and stir in the vanilla and butter. Stir in a few drops of pink food coloring, if you like, to enhance the color.

  • Step 2

    Transfer the custard to a bowl, cover with plastic wrap resting right against the surface of the custard, and refrigerate until well chilled. The custard can be made a day in advance, if you like.

Cupcakes

  • Step 1

    Preheat the oven to 350 and line a cupcake pan with 24 paper liners. For best results, let your dairy ingredients sit out for an hour or two to come to room temperature before mixing your cake batter.

  • Step 2

    In a large bowl, sift together the flour, sugar, baking soda, baking powder and salt. In a separate bowl, whisk together the eggs, milk, sour cream and extract. Add the wet ingredients to the dry, and whisk until well combined and smooth, with a few remaining lumps. Divide the batter between the paper liners.

  • Step 3

    Bake the cupcakes for about 15-18 minutes, until the centers spring back when lightly touched. Cool five minutes in the pan, and then carefully remove to a wire rack. Cover loosely with a clean kitchen towel and cool completely.

Buttercream and Assembly

  • Step 1

    In the bowl of your stand mixer fitted with the whisk attachment, beat the butter with 1/4 cup of the jam until smooth. With the mixer on low, add the powdered sugar, meringue powder, salt and vanilla. Increase the speed to medium and whip for 4-5 minutes, scraping the bowl occasionally, until very light and fluffy. Add more jam, if needed, for extra strawberry flavor and for desired consistency.

  • Step 2

    Use a cupcake corer to remove the centers of each cupcake. Spoon (or pipe) the chilled rhubarb custard into the centers of each cupcake. Fill a piping bag with the strawberry buttercream and pipe the buttercream onto the cupcakes. Garnish with fresh strawberry slices, if desired.

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