1/2 cup heavy cream (or heavy cream substitute), warm
1 Tbsp softened butter
1/2 tsp vanilla
Directions
Whisk sugars, corn syrup, water and lemon together in a glass bowl. Microwave on high for 5-8 minutes.
Gently remove from microwave; careful - it will be hot and let rest for 3-5 minutes. Stir in 1 tbsp cream and whisk well. The mixture will foam up then settle back. Add remaining cream, slowly (in batches) and whisk.
Add butter and vanilla and whisk well.
Allow to cool to room temperature.
Store in resealable container (mason jar is perfect!) in the refrigerator for up to two weeks.