Prepare strawberry puree by boiling 1 cup chopped strawberries, 2 Tbsp sugar, 1 box strawberry gelatin, and 1⁄4 cup water for 2-3 minutes. Puree mixture in a food processor. Allow to cool completely.
Whisk together 2 1⁄2 cups flour, 1 cup sugar, 2 tsp baking powder, 1⁄2 tsp baking soda.
On low speed, slowly mix 1 cup cubed butter into dry ingredients, until crumbly texture forms.
In a separate bowl, whisk together 1 cup sour cream, 3 eggs, and cooled strawberry puree.
With mixer on low, slowly pour egg mixture into dry ingredients, mixing just until combined. Add pink food coloring if using. Mix 3 minutes high speed.
Divide evenly between 2 nine-inch cake pans. Bake at 350°F for 20-25 minutes until a toothpick comes out clean.
Cool in pans 10 minutes then on a wire rack. Allow layers to completely come to room temperature.