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White chocolate and lemon layered dessert bars with a crumbly topping.

Gooey Lemon White Chocolate Cake Mix Bars


  • Author: Samantha Brooks
  • Total Time: 45 minutes
  • Yield: 16 bars 1x
  • Diet: Vegetarian

Description

The perfect intersection of zesty citrus and decadent sweetness. Using a clever cake mix shortcut, these bars feature a thick lemon crust, a melty white chocolate center, and a layer of sweetened condensed milk. The result is an incredibly soft, rich dessert that tastes like a high-end bakery treat with minimal effort.


Ingredients

Scale
  • 1 pkg (15.25 oz) Lemon Supreme cake mix
  • 1/2 cup (1 stick) unsalted butter, softened
  • 1/2 can (approx. 3/4 cup) sweetened condensed milk
  • 1 cup white chocolate chips (standard, not ‘baking chips’)
  • 1/2 cup granulated sugar, 1/4 cup 2% milk, 1 large egg

Instructions

Batter: Whisk cake mix, butter, sugar, egg, and milk until a thick dough forms.

Layers: Press half the dough into a sprayed 9×9 glass dish. Sprinkle white chocolate chips on top. Pour half the can of condensed milk over the chips.

Top: Spoon remaining dough in dabs over the milk; gently spread (it’s okay if the center peeks through).

Bake: Bake at 350°F for 25–30 mins. A toothpick should come out clean.

Set: Cool completely in the dish. For cleanest cuts, chill in the fridge for 1 hour before serving.

Notes

The ‘Goo’ Factor: Sweetened condensed milk is the structural secret. Using exactly half the can ensures a fudgy middle without the bars becoming too liquid or falling apart.

White Chocolate Choice: Standard chips are preferred over ‘premiere baking’ varieties because they often contain specific emulsifiers and cocoa butter levels that provide a superior melt in this dense bar format.

Patience is Key: Because of the high sugar and fat content in the center, these bars must reach room temperature (or lower) to fully set. Cutting while warm will result in a messy, unstructured slice.

  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Category: Dessert / Bars
  • Method: Layered Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 bar
  • Calories: 295
  • Sugar: 32
  • Sodium: 210
  • Fat: 12
  • Saturated Fat: 8
  • Unsaturated Fat: 4
  • Trans Fat: 0.3
  • Carbohydrates: 44
  • Fiber: 0
  • Protein: 3
  • Cholesterol: 40

Keywords: lemon white chocolate bars, gooey lemon bars, cake mix hack desserts, easy lemon treats, sweetened condensed milk recipes