Here is a solution for families who want to stop for an ice cream treat at a fast food restaurant. Some families have found these places very accommodating when they ask for a non-dairy creamer cone for their child with MSUD. Dairy Queen and others will often use their pressurized whipped topping to fill a cone. They may even put sprinkles on it. Some places may use real whipped cream which is higher in leucine. Food Values of Portions Commonly Used gives these values:

Pressurized whipped cream:
Protein (g)Leucine (mg)Calories
1 T.
0.19-
1/2 cup
0.8
72
-

Non-dairy whipped topping, pressurized:
Protein (g)Leucine (mg)Calories
1 T.
04-
1/2 cup
0.3
32
-

Add 30 mg leucine for a regular cone. Waffle cones have 90 mg leucine, and sugar cones are the highest with 1 gm leucine.