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Delicious hot fudge sundae brownie cheesecake topped with ice cream and fudge sauce.

Heavenly Hot Fudge Sundae Brownie Cheesecake

Creamy, fudgy, and downright irresistible, this dessert features a dense brownie base topped with a silky cheesecake layer, finished off with warm hot fudge and your favorite sundae toppings.
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Course: Dessert
Cuisine: American
Keyword: Brownies, Cheesecake, Chocolate
Prep Time: 25 minutes
Cook Time: 50 minutes
Total Time: 4 minutes
Servings: 12 servings

Equipment

  • 9x13-inch Baking Pan
  • Mixing Bowl
  • Electric Mixer

Ingredients

Brownie Layer

  • 1 box Brownie mix 18 oz, plus ingredients called for on the box (2 eggs, 1/2 cup vegetable oil, 1/4 cup water)

Cheesecake Layer

  • 16 ounces Cream cheese Softened to room temperature
  • 2/3 cup Granulated sugar
  • 2 large Eggs Room temperature
  • 1 teaspoon Pure vanilla extract
  • 1/2 cup Sour cream Room temperature or plain Greek yogurt
  • 1 tablespoon All-purpose flour Helps stabilize cheesecake

Toppings

  • 1 cup Hot fudge sauce Warmed (jarred or homemade)
  • 1 scoop Vanilla ice cream Optional sundae topping
  • 1 dollop Whipped cream Optional sundae topping
  • 1/4 cup Chopped toasted pecans or peanuts Optional sundae topping
  • 1 piece Maraschino cherry Optional sundae topping
  • 1 tablespoon Chocolate shavings Optional sundae topping
  • a pinch Sea salt For sprinkling on top

Instructions

  • Prepare the brownie mix according to the package instructions, adding eggs, oil, and water as required. If you like an extra chocolate punch, dissolve 1/2 teaspoon espresso powder in the water before mixing. Pour the batter into a greased 9x13-inch baking pan and bake according to package directions until a toothpick comes out with a few moist crumbs. Allow brownies to cool completely in the pan.
  • While the brownies cool, preheat the oven to 325°F (160°C). In a large bowl, beat the softened cream cheese until smooth and free of lumps. Add the granulated sugar and beat until well combined.
  • Add the eggs one at a time, mixing briefly after each addition until incorporated. Stir in the vanilla extract, sour cream, and flour. Mix on low speed until just smooth — avoid overmixing to prevent cracks.
  • Pour the cheesecake batter evenly over the cooled brownie base, smoothing the top with a spatula so the cheesecake layer is level. Tap the pan gently on the counter to release any large air bubbles.
  • Bake the layered dessert for 40–50 minutes, or until the center is mostly set but still has a slight jiggle. A thin knife inserted in the center should come out mostly clean. Turn off the oven, crack the door, and let the cheesecake cool inside for 30 minutes to reduce cracking.
  • Chill the cheesecake in the refrigerator for at least 4 hours, preferably overnight. When ready to serve, warm the hot fudge sauce and drizzle over individual slices. Top with a scoop of vanilla ice cream, a dollop of whipped cream, nuts, cherries, and a light sprinkle of sea salt if desired.

Notes

Use room-temperature cream cheese and eggs for a smooth, lump-free cheesecake batter. Cool brownies completely before adding cheesecake; a warm base can cause the layers to mix and bake unevenly.