cream cheese, white cake mix, gelatin, vegetable oil, large eggs and 8 more Best Strawberry Cake Ever Rose Bakes white cake mix, sugar, sugar, strawberry puree, sour cream… Mix together cream cheese, powdered sugar, and 1 tsp vanilla until smooth. Beat with an electric mixer on medium speed until smooth. Line with parchment paper. Instructions. Sour cream is the secret ingredient in this cake that helps make it so moist and delicious. Both work great. Grease and flour 3 (9-inch) round cake pans. Instructions. Bake according to directions on cake mix and let cool completely. There are so many different recipes you can use; sour cream will add flavor, moisture, and texture to just about any kind of cake. Preheat oven to 350 degrees. You can also substitute plain Greek yogurt for the sour cream. Preheat oven to 350 degrees F. Spray loaf pan with no stick cooking spray. Before adding your diced strawberries to the cake batter give them a light coating of flour (about 1/4 cup). Sour cream can be added to cake recipes to add fat with its creaminess, to add moisture, to activate baking soda so that the cake rises, and to control browning of the cake. Prepare as directed on cake mix and divide batter into 2 round cake pans or one 9 x 13 inch glass baking dish. In a large bowl, combine cake ingredients. In large mixing bowl add butter and sugar.