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A soft vanilla sponge cake rolled with airy whipped filling and decorated with a hand-painted watercolor white chocolate glaze in red, white, and blue, accented with white fondant or candy stars. This elegant and approachable flag-themed cake roll is designed for a crack-free sponge, stable filling, and perfect glazing technique.

Ingredients

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  • 4 large eggs, room temperature
  • 3/4 cup granulated sugar
  • 1 tsp vanilla extract
  • 3/4 cup all-purpose flour
  • 1 tsp baking powder
  • 1/4 tsp salt
  • Powdered sugar, for rolling
  • 1 cup heavy whipping cream
  • 1/2 cup powdered sugar
  • 1 tsp vanilla extract
  • Optional: 2 tbsp cream cheese, softened (for firmer slices)
  • 1 cup white chocolate chips or white candy melts
  • 1/4 cup heavy cream
  • Red gel food coloring
  • Blue gel food coloring
  • Small food-safe brushes or offset spatulas
  • White fondant or candy stars

Instructions

  1. Preheat oven to 350°F (175°C); line a 10×15-inch jelly roll pan with parchment paper and lightly grease the paper.
  2. Beat 4 large eggs on high with an electric mixer for 4–5 minutes until fluffy and pale, slowly adding 3/4 cup granulated sugar and 1 tsp vanilla extract while mixing.
  3. In a separate bowl, whisk together 3/4 cup all-purpose flour, 1 tsp baking powder, and 1/4 tsp salt.
  4. Gently fold the dry ingredients into the egg batter just until no streaks remain, avoiding overmixing.
  5. Pour the batter evenly into the prepared pan and smooth to the edges.
  6. Bake for about 10 to 12 minutes until the surface springs back when lightly pressed.
  7. Dust a clean kitchen towel generously with powdered sugar, flip the hot cake onto the towel, peel off the parchment, and roll the cake inside the towel while warm. Let it cool fully rolled to hold its shape.
  8. Chill a mixing bowl. Beat 1 cup heavy whipping cream, 1/2 cup powdered sugar, 1 tsp vanilla extract, and optional 2 tbsp softened cream cheese until stiff peaks form.
  9. Unroll the cooled cake, spread the whipped filling evenly, then re-roll without the towel. Wrap tightly in plastic wrap and refrigerate for at least 1 hour.
  10. Heat 1 cup white chocolate chips and 1/4 cup heavy cream in a microwave-safe bowl in short 20-second bursts, stirring until smooth. Let cool for 5–10 minutes before glazing.
  11. Pour the cooled glaze evenly over the chilled roll.
  12. Use small food-safe brushes or offset spatulas to apply red and blue gel food coloring across the glaze in sweeping horizontal strokes to create a watercolor effect, leaving some white areas.
  13. While the glaze is still tacky, press white fondant or candy stars into the blue area.
  14. Refrigerate the decorated roll for at least 1 hour (ideally 2 hours) before slicing.
  15. Slice chilled roll with a serrated knife, wiping the blade between each cut.

Notes

Adding cream cheese in the filling gives the roll more body and firmer slices but is optional., For the best-looking swirls and neat slices, chill the roll for two hours before serving., Store the rolled cake wrapped or in an airtight container in the refrigerator for up to 2–3 days., Decorate the glaze and add stars on the day you plan to serve for brightest colors and best shine., If the cake cracks when rolling, gently re-roll and patch cracks with extra filling., Avoid overbaking to prevent drying out and cracking., Use a 10×15-inch jelly roll pan or a similarly sized pan with thinner batter layer to ensure easy rolling.

Nutrition

Find it online: https://margorecipes.com/american-flag-cake-roll-with-red-white-and-blue-watercolor-finish-emmas-cake-studio/