Strawberry Margarita Cake

Why I Love This Recipe
from bettycrocker site
Nonalcoholic strawberry margarita mix makes this party cake a great addition to picnics and potlucks.
Ingredients You'll Need
3/4 cup bottled strawberry-flavored nonalcoholic margarita drink mix
1 box Betty Crocker® SuperMoist® white cake mix
Vegetable oil and egg whites called for on cake mix box
1 tablespoon grated lime peel
1 container (8 oz) frozen whipped topping, thawed
Strawberries, if desired
Directions
Heat oven to 350°F (325°F for dark or nonstick pan). Grease (or lightly spray with cooking spray) bottom only of 13x9-inch pan. Add enough water to drink mix to measure 1 1/4 cups.
In large bowl, beat cake mix, drink mix, oil and egg whites on low speed 2 minutes. Pour into pan. Bake and cool and directed on box.
Gently stir lime peel into whipped topping; spread over top of cake. Garnish with strawberries. Store covered in refrigerator.