1-First Step: Preparation and Mise en PlaceBefore mixing any ingredients, preheat your oven to 350°F (175°C). Prepare a 13×18-inch half-sheet pan by greasing it thoroughly with butter or cooking spray and lining the bottom with parchment paper for easy removal. This prevents sticking and ensures your cake releases perfectly after cooling.Wash and hull 1-2 cups of fresh strawberries. Puree them in a blender or food processor until smooth. You’ll need 1 cup for the cake batter and approximately 1/4 cup for the frosting. If you prefer a smoother texture without seeds, strain the puree through a fine-mesh sieve.Gather and measure all ingredients before beginning. Room temperature ingredients mix more easily and create better texture. Take eggs and butter out of the refrigerator at least 30 minutes before baking.

2-Second Step: Mix the Dry IngredientsIn a large mixing bowl, whisk together 2 cups of all-purpose flour, 2 cups of granulated sugar, 1 teaspoon of baking soda, and 1/2 teaspoon of salt. Whisk thoroughly to ensure the baking soda and salt are evenly distributed throughout the flour and sugar. This prevents any bitter spots in your finished cake and helps with even rising.For those using gluten-free flour, this is when you would add your 1-to-1 gluten-free blend. Make sure to whisk even more thoroughly to distribute any xanthan gum present in the blend.

3-Third Step: Combine Wet IngredientsIn a separate medium bowl, crack 2 eggs and beat them lightly with a whisk or fork. Add 1 cup of buttermilk, 1/2 cup of vegetable oil (or melted coconut oil for a subtle coconut flavor), 1 teaspoon of vanilla extract, and 1 cup of the strawberry puree. Whisk until well combined.The strawberry puree not only adds flavor but also contributes natural moisture to the cake, creating that perfect tender crumb texture.For dietary adaptations: vegans can use their prepared flax eggs, dairy-free buttermilk alternative, and plant-based oil here. Those watching calories might replace half the oil with unsweetened applesauce or Greek yogurt.

4-Fourth Step: Mix the BatterPour the wet ingredients into the dry ingredients. Using a spatula or wooden spoon, gently fold the mixtures together just until combined. Be careful not to overmix, which can develop gluten and result in a tough, dense cake. Stop mixing as soon as you no longer see dry streaks of flour. The batter will be slightly thick and pinkish in color.Check out this strawberry sheet cake recipe for additional mixing techniques and visual guidance. Each baker might have slightly different preferences for batter consistency.

5-Fifth Step: Bake the CakePour the batter into your prepared sheet pan, spreading it evenly with an offset spatula. Tap the pan gently on the counter once or twice to release any air bubbles. Bake at 350°F for 20-25 minutes, or until a toothpick inserted in the center comes out clean or with just a few moist crumbs.The cake should be lightly golden on top and spring back when touched gently in the center. Begin checking for doneness around the 20-minute mark to avoid overbaking, which can dry out the cake.

6-Final Step: Prepare Frosting and ServeWhile the cake cools completely in the pan (about 30-45 minutes), prepare the strawberry frosting. In a large bowl, beat 1/2 cup of softened butter until creamy. Gradually add 4 cups of powdered sugar, mixing on low speed to prevent a cloud of sugar dust. Add 1/4 cup of strawberry puree and 1 teaspoon of vanilla extract. Beat on medium-high speed for 3-5 minutes until light and fluffy.Spread the frosting evenly over the cooled cake. For a beautiful presentation, garnish with fresh sliced strawberries or whole berries. Slice into squares and serve. This strawberry sheet cake is delicious on its own or with a scoop of homemade strawberry ice cream on the side.