Chocolate Sauce

Combine cocoa powder and butter in a small saucepan over medium heat, stirring constantly to create a smooth paste.

Pour the sweetened condensed milk into the saucepan and whisk until fully incorporated with the cocoa mixture.

Continue heating and stirring until the sauce reaches a gentle simmer and thickens slightly, approximately 3 minutes.

Remove from heat and stir in the vanilla extract until evenly distributed throughout the sauce.

Allow the sauce to cool for 1-2 minutes before serving, as it will continue to thicken as it cools.