Lemonade Shake

1 pint vanilla ice cream, softened
1 (12 ounce) can lemon-lime soda
1/4 cup frozen lemonade concentrate
2 drops yellow food coloring (if desired)

Combine ice cream, soda and lemonade concentrate in a 1-quart container with a lid. Cover and shake until smooth. If desired, add food coloring, cover and shake again.

Makes 2 cups.