1-First Step: Gather all ingredients and tools: a heavy 3-quart saucepan, candy thermometer, 9×9-inch pan greased or lined with parchment, wooden spoon, and heatproof spatula. Measure precisely for success. For vegan adaptations, prepare coconut milk and dairy-free chocolate now. This mise en place prevents rushing and errors, ideal for working professionals.

2-Second Step: Combine 3 cups granulated sugar, 3/4 cup heavy cream, 1/4 cup light corn syrup, pinch of salt, and 12 oz chopped semi-sweet chocolate in the saucepan. Stir over medium heat until sugar fully dissolves, about 5 minutes. Avoid splashing; use a wet pastry brush to wash down sides and prevent crystals. Low-calorie tip: stir in stevia here.

3-Third Step: Increase heat to medium-high, clip on candy thermometer, and bring to a boil without stirring. Cook until reaching 236°F (soft-ball stage), 10-15 minutes. Bubbles will thicken. Test by dropping a bit in ice water; it forms a soft ball. For gluten-free, no changes needed. Watch closely to avoid overcooking, which causes graininess.

4-Fourth Step: Remove from heat immediately. Add 4 tbsp unsalted butter and 1 tsp vanilla extract without stirring. Let cool undisturbed to 110°F, about 45-60 minutes. This resting allows flavors to meld and sets up creamy texture. Cover loosely if needed. Vegan swap: use vegan butter here.

5-Fifth Step: Once at 110°F, remove thermometer and beat vigorously with a wooden spoon for 5-10 minutes until thick and matte, losing gloss. Add optional 1 cup chopped walnuts in the last minute. Hands may tire, but this aerates for fudgy results. Speed up with a mixer on low.

6-Sixth Step: Quickly pour into prepared 9×9 pan, spreading evenly. Cool at room temperature overnight or at least 4 hours until firm. Refrigerate only if humid. Patience here ensures perfect slices.

7-Final Step: Lift out with parchment, cut into 1-inch squares using a sharp knife dipped in hot water. Store as below. Serve at room temp for best melt. Customize with sea salt topping for extra flair. Troubleshooting: if grainy, see tips section. This easy old fashioned fudge recipe shines for baking enthusiasts.