Starbucks Copycat Vanilla Creme Frappucino

3/4 cup milk
6 tablespoons heavy cream, frozen in an ice cube tray (3 cubes)
6 ice cubes
2 tablespoons agave nectar or maple syrup
2 teaspoons vanilla extract
1/2 teaspoon chia seeds (optional, looks like vanilla bean)

Blend all ingredients in a high-power blender.* Serve immediately.

*I use the Smoothie setting on my Blendtec blender.