1. Preheat your oven to 350°F (175°C). This ensures even cooking right from the start.
2. Grease and flour a 9×13-inch baking pan thoroughly to prevent sticking. This creates a smooth release and avoids damaging the cake’s structure.
3. Healthier option: Line the pan with parchment paper for an easy, mess-free alternative. It’s ideal for those looking to reduce excess oil or butter.

1. In a large bowl, combine:
– 1 box vanilla cake mix
– 3 eggs
– 1 cup sour cream
– ½ cup vegetable oil
– 1 teaspoon vanilla extract
2. Mix until the batter achieves a smooth and lump-free consistency. For best results, avoid overmixing, as it can make the cake dense.
3. Pro tip: Incorporate ingredients evenly to ensure consistent texture and flavor in every bite.

1. Pour half of the batter into the prepared pan and spread it evenly.
2. Sprinkle half of the cinnamon-sugar mixture (½ cup brown sugar + 1 teaspoon ground cinnamon) over the batter. This layer enhances the cake’s signature swirl effect.
3. Evenly distribute the diced strawberries, ensuring they’re spread across the entire surface for balanced flavor.
4. Pour the remaining batter on top and finish with the rest of the cinnamon-sugar mixture.

1. Bake for 30-35 minutes, checking for doneness by inserting a toothpick into the center. If it comes out clean, the cake is ready.
2. Adjust baking time slightly for different oven types—convection ovens may require less time.

1. In a bowl, mix:
– 2 cups powdered sugar
– 2 tablespoons milk
– ½ cup strawberry puree
– 1 teaspoon vanilla extract
2. Adjust consistency by adding more milk if needed. For an extra tangy flavor, try incorporating cream cheese into the icing.

1. Allow the cake to cool for 10-15 minutes before drizzling the icing over the top.
2. Use a spatula for a smooth, even spread or let the icing naturally drizzle for a rustic look.
3. Garnish with fresh strawberries or mint leaves for a decorative touch, perfect for serving at special events.