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Desserts · Part 2 of 3: Instructions

Crockpot Funfetti Birthday Dump Cake Step-by-step instructions

A warm, gooey Funfetti dump cake inside a ceramic slow cooker with rainbow sprinkles.
Prep
Cook
Total
Serves
8

Before you start

Before starting, make sure the slow cooker is clean and dry. Measure out all ingredients and have them ready. Whisk the sweetened condensed milk and milk together in the slow cooker base until smooth. Then, sprinkle the cake mix evenly over the top.

Do not stir. Scatter the white chocolate chips and rainbow sprinkles over the cake mix, then dot with butter pats. Cover and cook on HIGH for 2 hours. You'll need dessert bowls and spoons for serving, plus whipped cream and extra sprinkles for topping.

Ingredients at a glance (6)
  • 14 oz sweetened condensed milk
  • 1 cup milk
  • 1 box Funfetti cake mix (about 15.25 oz)
  • 1 cup white chocolate chips
  • 1/2 cup rainbow sprinkles
  • 12 pats butter (about 1 1/2 tbsp total)

Instructions

Layer and Set

  1. Make the condensed milk base
    In the slow cooker base, whisk together the sweetened condensed milk and milk until fully combined. The mixture should be smooth and slightly thickened.
    Look for The base is smooth and pale ivory, with no streaks of condensed milk.
    Tip Whisk gently to avoid creating too many air bubbles.
  2. Layer the cake mix and toppings
    Sprinkle the Funfetti cake mix evenly over the milk mixture. Do not stir. Scatter the white chocolate chips and rainbow sprinkles over the cake mix. Dot the top with the pats of butter.
    Look for The top is covered with a dry layer of cake mix, chips, sprinkles, and butter pats.
    Tip Do not stir after adding the cake mix; the layers create the gooey texture.

After layering the condensed milk base, cake mix, chips, sprinkles, and butter, the slow cooker should look like a colorful, dry-topped surface. The milk mixture is at the bottom, and the cake mix is a powdery layer on top. The butter pats are visible, and the sprinkles add pops of color. This is the perfect setup for the slow cooker to work its magic.

Slow Cook and Melt

  1. Slow cook on high
    Cover the slow cooker and cook on HIGH for 2 hours. Do not lift the lid during cooking. The edges will bake and turn golden while the center stays soft and spoonable.
    Look for The edges look golden and set, while the center is glossy and slightly jiggly.
    Safe temperature 160°F (71°C) internal temperature (egg dishes)
    Tip Resist the urge to open the lid; the steam helps the cake cook evenly.
  2. Check for doneness
    After 2 hours, check the cake. The internal temperature at the center should reach 160°F (71°C) to ensure the eggs are fully cooked. The edges should be set and golden, the center moist and tender.
    Look for A toothpick inserted into the center comes out with moist crumbs, not wet batter.
    Safe temperature 160°F (71°C) internal temperature (egg dishes)
    Tip If the center is still too loose, cook for an additional 15 minutes and check again.

After 2 hours on HIGH, the kitchen smells like vanilla and butter. The edges of the cake are golden and slightly crispy, while the center is glossy and moist.

The white chocolate chips have melted into creamy pools, and the sprinkles have bled slightly, creating a festive tie-dye effect. The cake is bubbling gently around the edges. It should look set but still soft in the middle.

Serve and Savor

  1. Serve warm
    Scoop the warm cake into dessert bowls. Top with whipped cream, extra rainbow sprinkles, and a birthday candle if desired. Serve immediately.
    Look for The cake is warm, gooey, and studded with melted white chocolate and sprinkles.
    Tip For clean scoops, use a large spoon and scoop from the center outward.

When you scoop into the cake, it should be soft, warm, and spoonable. The texture is like a cross between a baked cake and a warm pudding. The edges are firmer and slightly chewy, while the center is tender and gooey. The melted white chocolate adds a creamy richness, and the sprinkles provide a slight crunch. It's ready to be topped with whipped cream and served.

Common mistakes

One common mistake is lifting the lid during cooking, which lets out steam and lowers the temperature. This can cause the cake to be undercooked in the center. Another mistake is stirring the cake mix into the milk base; this creates a batter that won't cook properly in the slow cooker.

Also, avoid using a slow cooker that's too small, as the cake may bubble over. Finally, don't overcook the cake—it should be gooey, not dry. Check at the 2-hour mark and adjust accordingly.

How to tell it’s done

The cake is done when the edges are golden and set, and the center is moist and tender but not liquid. A toothpick inserted into the center should come out with moist crumbs, not wet batter. The internal temperature at the center should reach 160°F (71°C) to ensure the eggs are fully cooked.

If the center still looks too soft, cook for an additional 15 minutes and check again. The top may look slightly crackly, which is normal. Let the cake cool for 5 minutes before serving—it will set slightly but remain spoonable.

  • Egg dishes: 160°F (71°C) in the thickest part

Coming up in Part 3: common questions

  • Can this dump cake be made in the oven?
  • Why is the center still liquid after 2 hours?
  • Can this recipe be made gluten-free?
  • How should this cake be stored?
  • Can the amount of sugar be reduced?

Also in Part 3: variations (Chocolate Lover's Dump Cake, Strawberry Birthday Cake, Peanut Butter Swirl, Caramel Apple Dump Cake), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

4 variations · storage & make-ahead · 5 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)