Preheat the oven to 350F. Grease a 9x13" baking dish and set aside.

Add the cake mix, lemonade, water, oil, eggs, lemon extract, zest of a lemon and pink food coloring to a large mixing bowl of a stand-up mixer.

Start low and increase speed beating on medium for 2 min.

Pour the batter into the prepared baking dish. Bake for 25-30 min. or as per instructions on the box or until a toothpick inserted in the middle comes out
clean.

Cool in pan completely on a wire rack and make the frosting. 

In a bowl of a stand-up mixer slowly whip the softened butter.

Add the icing sugar slowly until all is incorporated. Then add the lemonade, lemon extract, and food coloring and beat on medium-high until fluffy.

If still too thick then add a bit of water, 1/2 Tbsp. at a time to desired thickness.

Once the cake is cooled completely you can ice with the buttercream.

Cover and refrigerate until ready to serve.