Pineapple Smoothie

1 (20 ounce) can unsweetened pineapple chunks
1 cup buttermilk
2 teaspoons vanilla extract
2 teaspoons liquid sweetener
Mint leaves (optional)

Drain pineapple, reserving 1/2 cup juice. Freeze pineapple chunks.

Place juice, buttermilk, vanilla extract, sweetener and frozen pineapple into a blender container. Blend until smooth. Pour into glasses and garnish with mint, if desired.