Melt the Butter

In a medium saucepan over medium heat, melt the butter until fully liquefied.

Add Sugar and Milk

Stir in the brown sugar and milk until fully combined.

Cook the Mixture

Bring the mixture to a gentle boil, stirring constantly to prevent burning.

Reduce heat and simmer for 2–3 minutes until smooth and slightly thickened.

Cool Slightly

Remove from heat and let it cool for a few minutes. This will help it thicken to a spreadable consistency.

Frost Your Dessert