Karen's Margarita Cupcakes

9 ounces margarita mix
3 ounces tequila
3/4 ounces Grand Marnier
1 box white cake mix
3 egg whites
2 tablespoons vegetable oil
1 tablespoon lime zest

Mix together the margarita mix, tequila, and Grand Marnier in a large glass or spouted bowl. You will use 1 1/4 cup of this in the cupcake mix. Pour the remainder over ice and enjoy the mini-rita while you’re baking.
In a stand mixer, add the cake mix, egg whites, vegetable oil, lime zest, and 1 1/4 cup of the margarita mixture. Mix on low for about 30 seconds and then increase to medium speed for two minutes (the batter will still be a bit lumpy).
Spoon the batter into a prepared muffin pan (fill the cups somewhere between 2/3 and 3/4 full) and bake at 350 for about 25 minutes or until a toothpick registers “done” in the center cupcake. Remove the pan from the oven and cool 5 minutes. Remove the cupcakes and cool completely on a baking rack.
Once the cupcakes have cooled, make the Lime Buttercream Icing and ice the cupcakes.

Source: The Nest What's Cooking Board