Preheat the oven to 350 degrees F. Add cupcake liners to cupcake pan(s).
In a medium bowl, whisk the cake flour, baking powder, baking soda, and salt for 30 seconds and set aside.
In another bowl, combine the sour cream, vegetable oil, ½ cup concentrated lemonade (thawed), lemon extract, and lemon zest. Set aside.
In the bowl of your mixer, add the softened butter and mix at medium speed until smooth.
Gradually add the sugar and continue to mix on medium speed for 3 to 5 minutes until lightened in color and fluffy.
Add the room temperature eggs one at a time, mixing until the yellow of the yolk disappears. If using Yellow Coloring Gel, you can add it now or any time during the mixing process.
With the mixer on low speed, alternately add the flour mixture and the lemonade mixture, beginning and ending with the flour mixture (We did 3 additions of the dry mixture, 2 additions of wet). Slightly increase the mixer speed just until combined.
Scoop about ¼ cup bake batter into each cupcake liner (in the cupcake pans)
Bake at 350 degrees for 14-16 minutes or until a toothpick inserted in the center comes out clean or with just few crumbs attached. We like to remove cupcakes immediately from the pans to prevent over-baking. Baking times can vary depending on pan & oven- check at 14 minutes to be on the safe side, but it may take a few minutes more.
This recipe makes approximately 7 cups of batter-- approximately 28-30 cupcakes.