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Boston Cream Fudge Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.5 from 61 reviews
  • Author: Lisa
  • Prep Time: 10 minutes
  • Cook Time: 20 minutes
  • Total Time: 30 minutes
  • Yield: 25 pieces 1x
  • Category: Dessert
  • Method: Stovetop
  • Cuisine: American

Description

This Boston Cream Fudge is a luscious layered confection combining creamy white chocolate fudge with a rich cocoa fudge swirl, topped with a glossy semi-sweet chocolate coating. Perfectly smooth and decadently sweet, this fudge combines the classic flavors of Boston cream in a rich, bite-sized treat that’s ideal for sharing or gifting.


Ingredients

Scale

Fudge Base

  • 2 cups granulated sugar
  • ¾ cup unsalted butter
  • ⅔ cup heavy cream
  • ¼ cup light corn syrup
  • 6 ounces white baking chocolate, chopped
  • 7 ounces marshmallow cream
  • 1 teaspoon vanilla extract

Cocoa Swirl Layer

  • 1½ tablespoons unsweetened cocoa powder, sifted

Chocolate Topping

  • 1 cup semi-sweet chocolate chips
  • 1½ tablespoons vegetable oil

Instructions

  1. Prepare the pan: Line an 8×8-inch baking pan with parchment paper, ensuring the paper extends over the edges for easy removal. Lightly spray the parchment with nonstick cooking spray to prevent sticking.
  2. Cook the fudge base: In a heavy-bottomed saucepan, combine sugar, butter, heavy cream, and corn syrup. Stir continuously over medium heat until the mixture comes to a rolling boil.
  3. Reach soft-ball stage: Continue boiling while stirring for 4-5 minutes until a candy thermometer registers 235-240°F (soft-ball stage) to ensure proper consistency.
  4. Melt white chocolate: Remove the pan from heat and stir in chopped white baking chocolate until fully melted and smooth.
  5. Add marshmallow cream and vanilla: Stir in the marshmallow cream and vanilla extract until well combined, creating the white fudge layer.
  6. Pour white fudge: Pour about ¾ of the white fudge mixture into the prepared baking pan, spreading evenly.
  7. Prepare cocoa fudge swirl: Add sifted unsweetened cocoa powder to the remaining fudge mixture. Whisk until smooth and fully incorporated.
  8. Layer cocoa fudge: Carefully spoon the cocoa fudge mixture over the white fudge layer.
  9. Swirl layers: Use a toothpick or skewer to swirl the two fudge layers together gently, creating a marbled effect.
  10. Cool and chill: Let the fudge cool at room temperature for about 1 hour, then cover with aluminum foil and refrigerate for another hour until firmly set. Alternatively, if your kitchen is cool, you may let it set completely on the counter.
  11. Slice fudge: Lift the set fudge out of the pan using the parchment overhang. Using a sharp knife, slice into 5 x 5 (25 pieces) or 6 x 6 (36 pieces) as preferred.
  12. Prepare chocolate topping: In a microwave-safe bowl, combine semi-sweet chocolate chips and vegetable oil. Heat on high for 30 seconds, stir, then continue heating in 15-second intervals, stirring between until smooth and melted.
  13. Dip fudge tops: Dip each fudge piece’s top into the melted chocolate and place on parchment paper to set. Allow the chocolate topping to fully set before serving.

Notes

  • This fudge is best served at room temperature for optimal texture.
  • Store in an airtight container at room temperature for up to one week or refrigerate for 2-3 weeks.
  • To freeze, wrap fudge tightly in parchment and aluminum foil, place in a freezer-safe container, and store up to 2 months. Thaw overnight in the refrigerator before serving.
  • To facilitate easy cutting, warm your knife under hot water, dry it, and then slice the fudge cleanly without sticking.
  • Be cautious while cooking sugar to avoid crystallization by preventing sugar splashes on the pan sides.
  • Allow fudge to set on the counter if your kitchen is cooler to avoid over-chilling.

Nutrition

  • Serving Size: 1 piece (approx. 28g)
  • Calories: 160
  • Sugar: 20g
  • Sodium: 30mg
  • Fat: 8g
  • Saturated Fat: 5g
  • Unsaturated Fat: 2g
  • Trans Fat: 0g
  • Carbohydrates: 22g
  • Fiber: 1g
  • Protein: 1g
  • Cholesterol: 25mg