Spiced Ermine Buttercream Recipe

8 Make your Macaron Batter and shape as directed. 
0 In a small saucepan, heat milk to a gentle boil with the spices. Turn off the heat and let infuse for 10 -15 minutes.
1 Add a little bit of cold water to the cornstarch to make a slurry.
2 Remove the cinnamon stick.
3 Heat back the milk, add sugar, salt, and mix well. Slowly add the cornstarch slurry while mixing, whisk until smooth.
4 Bring to a boil, it should thicken, strain into the bowl of a mixer and chill completely to room temperature.
5 Beat mixture with paddle attachment until smooth.
6 Gradually incorporate butter until smooth and emulsified.
7 Separate into bowls and add food coloring of interest.