Disney says

An Avalanche of Icy Treats

Located just past Knick’s Knacks in Disney California Adventure Park, this cool quick-service counter offers frozen, soft-serve desserts in refreshing tropical flavors. Choices include “It’s Lemon” or DOLE Whip® pineapple, a specialty from the Tiki Juice Bar.
Friendliest.app says
Adorable Snowman Frosted Treats servers chocolate, vanilla and non-dairy lemon soft serve. The lemon no longer shares a machine with the other soft serve flavors, reducing the risk of milk cross contamination.

This restaurant handles ice cream cones which contain gluten/wheat. If you have a gluten allergy you may want to ask the cast member to switch gloves and wipe surfaces to reduce cross contamination risks from the cones.

Allergy-friendly meals at Adorable Snowman Frosted Treats