
Over medium high heat combine the blueberries, brown sugar and vanilla in a small pot. Cook for 2-3 minutes. Liquid should be smooth and blueberries should be breaking down. Set aside to cool a bit.
Transfer the compote to a small blender and pulse until smooth.
Brew espresso and set aside.
Layer 1-2 tbsp of blueberry compote in the cup then fill the cup with ice.
Pour milk of choice over ice then add the espresso.
Give it a little stir and enjoy.