Preheat the oven to 350°F. Line two 8-inch round cake pans with parchment paper and spray with nonstick baking spray.
In a medium bowl, combine the flour, baking soda, baking powder, and salt. Whisk the dry ingredients together and set aside for later.
2½ cup All-purpose flour, 1½ teaspoon Baking soda, 1½ teaspoon Baking powder, 1 teaspoon Salt
Add the eggs and sugar to a large mixing bowl. Beat on high speed for 5 to 7 minutes until the mixture gets light in color and nearly triples in volume. If you lift the beater and let the mixture fall back into the bowl, it should fall in a ribbon-like pattern. This step will help add volume and lightness to the cake.
3 Eggs, 1½ cup Sugar
Stir in the melted butter, oil, strawberry jam, freeze-dried strawberry powder, strawberry extract, vanilla extract, and pink food coloring (if using).
6 tablespoon Butter, ¼ cup Oil, ½ cup Strawberry jam, 1 oz Freeze-dried strawberry powder, 1 tablespoon Strawberry extract, 1 teaspoon Vanilla extract, 1 teaspoon Pink gel food coloring
Sift half of the flour mixture over the batter and stir it with a wide spatula.
Stir in the buttermilk, then sift the rest of the flour mixture over the batter and stir it in until well combined.
1 cup buttermilk
Spread the batter into the cake pan and bake for 35 to 40 minutes or until a toothpick inserted in the center comes out clean.