Valentine's Day Microwave Fudge

Combine sugar, evaporated milk, margarine, and salt in a large microwave-safe bowl. Microwave on high power until the mixture reaches a rolling boil, stirring once halfway through.

Continue microwaving the boiling mixture for 2 minutes without stirring to ensure proper candy temperature development.

Add the semi-sweet chocolate chips and vanilla extract, stirring until the chocolate is completely melted and blended.

Pour the fudge into a buttered 8x8-inch pan or similar-sized container, spreading it into an even layer.

Allow the fudge to cool at room temperature for at least 2 hours until completely set and firm to the touch.

Cut the cooled fudge into 1-inch squares using a sharp knife, wiping the blade between cuts for clean edges.