Step 1

With a double boiler, melt butter in a heatproof bowl until almost liquid.

Step 2

Remove bowl from heat and whisk until completely melted.

Step 3

Gradually pour milk into the butter while whisking. Continue stirring for about 5 minutes.

Step 4

Allow the mixture to cool for 5 minutes.

Step 5

Add the remaining ingredients and pour into the bowl of a stand mixer.

Step 6

Gradually increase the speed of the stand mixer to high and mix until thickened to desired consistently.

Step 7

Add more powdered sugar 1 tbsp at a time as needed for additional thickness.

Step 8

With a double boiler, melt butter in a heatproof bowl until almost liquid.

Step 9

Remove bowl from heat and whisk until completely melted.

Step 10

Gradually pour milk into the butter while whisking. Continue stirring for about 5 minutes.

Step 11

Allow the mixture to cool for at least 5 minutes.

Step 12

Add the remaining ingredients

Step 13

Whisk the mixture for 5-7 minutes.

Step 14

If thickness is not achieved, place the bowl in the refrigerator and allow to cool for 5 more minutes. Whisk for five more minutes.