This hot fudge sundae features a rich, glossy homemade hot fudge sauce draped over cold, creamy vanilla ice cream. The sauce is deeply chocolatey with a silky texture that firms up slightly on contact with the ice cream but stays wonderfully scoopable. Made with real chocolate, cream, and butter—no corn syrup or additives—this restaurant-quality dessert comes together in just 15 minutes and is endlessly customizable.
Medium heavy-bottomed saucepan Essential for even heat distribution and preventing scorching
Whisk
Rubber spatula
Ice cream scoop
Sundae glasses or bowls
Measuring cups and spoons
Glass storage jar with lid For storing leftover sauce
Ingredients
For the Hot Fudge Sauce
1cupheavy cream240ml
¾cupgranulated sugar150g
½cupunsweetened cocoa powder50g
4ouncesdark chocolate113g, chopped, 60-70% cacao works best
4tablespoonsunsalted butter57g
1teaspoonvanilla extract5ml
¼teaspoonsalt1.5g
For the Sundaes
1½quartsvanilla ice cream1.4L, or your favorite flavor
whipped creamhomemade or store-bought, for topping
maraschino cherriesfor garnish
½cupchopped nuts60g, pecans, walnuts, or peanuts
chocolate sprinklesoptional, or crushed cookies or candy pieces
Instructions
Measure out all ingredients before starting. Chop dark chocolate into small, uniform pieces. Let butter soften at room temperature for 10 minutes and ice cream soften for 5 minutes.
In a medium saucepan, whisk together heavy cream, sugar, and cocoa powder over medium heat. Bring to a gentle simmer, whisking constantly to prevent lumps, and simmer for 2-3 minutes until sugar dissolves and mixture is smooth.
Remove saucepan from heat. Add chopped dark chocolate and butter, letting sit for 1 minute, then whisk gently until completely melted and glossy. Stir in vanilla extract and salt.
Return saucepan to low heat if sauce seems too thick. Cook for 1-2 minutes, stirring constantly, until it coats the back of a spoon but still pours easily. It will thicken slightly as it cools.
Use an ice cream scoop to create 2-3 generous scoops per sundae in chilled sundae glasses or bowls. Work quickly so the ice cream doesn't melt.
Pour warm hot fudge sauce generously over the ice cream. Add a dollop of whipped cream, sprinkle with chopped nuts, and top with a maraschino cherry.
Serve immediately while the temperature contrast between hot fudge and cold ice cream is at its peak. Provide long spoons and extra hot fudge sauce on the side.
Notes
Use quality chocolate: Look for chocolate with 60-70% cacao content for the best balance of sweetness and chocolate intensity.
Don't let it boil: Once you add the chocolate, keep the heat low. Boiling can cause the chocolate to seize and become grainy.
Stir constantly: Cocoa powder can clump if you're not vigilant. Keep whisking, especially in the beginning.
Test the consistency: Dip a cold spoon in the sauce. It should coat the spoon but still drip off slowly. If too thick, add a tablespoon of cream at a time.
Warm your sauce before serving: If made ahead, reheat gently over low heat or in 15-second microwave bursts, stirring between each one.
Let ice cream soften slightly: Ice cream that's too hard won't let the hot fudge sink in properly. Five minutes on the counter is perfect.
Layer the toppings strategically: Put half the hot fudge on the ice cream, add nuts, then add more hot fudge. This ensures toppings in every bite.
Chill your sundae glasses: Pop them in the freezer for 10 minutes before assembling. This helps the ice cream stay firm longer.
Storage: Store hot fudge sauce in an airtight glass jar in the refrigerator for up to 2 weeks, or freeze for up to 3 months. Never store assembled sundaes.
Make-ahead: Prepare the sauce up to 2 weeks in advance. On party day, reheat gently in a small slow cooker set to warm for easy serving.