To your serving glass, add the matcha powder and the hot water and mix until dissolved.
1 tablespoons sweetened matcha powder, 3 tablespoons hot water
Top that with the oat milk then some ice, making sure to leave enough room for your lavender cold foam.
1 cup creamy oat milk, ice cubes
For the lavender cold foam
in a 1 cup measuring cup add the milk, heavy cream, lavender syrup, and purple food coloring and froth using a handheld frother until the mixture thickens. This can take 1-2 minutes.