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+ servings

Patriotic Strawberry Cake

Moist strawberry cake with rich buttercream in red. white and blue!
Servings 16 servings
Prep Time 1 hr 30 mins
Cook Time 35 mins
Total Time 2 hrs 5 mins


  • 9x13-inch baking pan
  • KitchenAid® Professional 600 Series Mixer
  • Food processor
  • Rubber spatula
  • Medium bowl
  • Sifter
  • Whisk
  • Large measuring cup
  • 1 Toothpick
  • Pastry brush
  • Medium sauce pan
  • Icing bags
  • Icing tip - various
  • Icing scraper
  • Icing spatula
  • Food coloring
  • Sprinkles



  • cups cake flour sifted (or 2¼ cups all-purpose flour + ¼ cup cornstarch)
  • 2 tsp baking powder
  • ½ tsp baking soda
  • tsp salt
  • 1 ¾ cup granulated sugar
  • ¾ cup unsalted butter (1½ sticks) room temperature
  • 3 large eggs
  • cup buttermilk (make your own)
  • 1 tbsp strawberry simple syrup

STRAWBERRY PUREE (make day before)

  • 1 pound strawberries ripe


  • 8 oz strawberries ripe, chopped
  • 1 cup water
  • 1 cup granulated sugar


  • 1 cup unsalted butter
  • cups powdered sugar
  • 1 tsp whole milk
  • 1 tsp strawberry simple syrup
  • tsp salt



  • Preheat oven to 350 degrees F. Grease the bottom and sides of a 9x13-inch pan. Set aside.
  • In a medium bowl, combine sifted cake flour, baking powder, baking soda and salt. Set aside.
  • If making buttermilk, combine ingredients in a large glass measuring cup or small bowl and set aside to allow coagulation. I used whole milk and vinegar to make buttermilk for this cake.
  • Using a stand up or hand mixer, cream butter and sugar on high speed for 3-5 minutes until light and fluffy. Scrape down sides.
  • Add eggs and vanilla extract to the buttermillk in the measuring cup and stir together.
  • With mixer on low, alternate the flour mixture and buttermilk mixture until all ingredients are just combined. Do not over-mix the batter. Make sure to scrape down the sides during the process.
  • Fold strawberry puree into batter.
  • Pour cake batter into prepared pan. Bake for 30 - 40 minutes. Adjust time slightly according to your oven. My oven time was 37 minutes. Toothpick should come out mostly clean when checked in the center. Allow to cool completely before decorating.
  • Careful not to over-bake as the cake will continue to cook for 10 minutes on a cooling rack.


  • Puree fresh, ripe strawberries in a food processor, or blender.
  • In a medium sauce pan, reduce puree on the stove by heating on low-medium heat until reduced to about ½ cup. Usually, about 30 minutes. More time depending on your pan and the juiciness of the berries. Do not add sugar to the puree.
  • Allow to cool completely and store in an airtight container. Refrgerate if not using right away. Make sure to bring the puree back up to room temperature before adding to batter.


  • In a small sauce pan, combine chopped strawberries, water and sugar over medium-high heat and bring to a boil
  • As the mixture begins to boil, reduce heat to low and simmer for 5 minutes.
  • Cool to room temperature then strain. Store in refrigerator in an air tight container for up to 2 weeks.


  • In a large bowl, use a stand-up or hand mixer to cream butter. Add powdered sugar and combine completely.
  • Add milk, vanilla extract and salt. ** Replace vanilla extract with strawberry simple syrup if you want more berry flavor in the butttercream.
  • Beat for 3 to 5 minutes until smooth and creamy and you reach your desired consistency.


The Prep and Cooking times are for the entire process before decorating.
Course: Dessert
Keyword: Birthday, Buttercream, Cake, Frosting, Patriotic, Strawberry, Vanilla