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Toffee lovers, this one is for you. Start with a baked devil’s food chocolate cake in a 9×13, poke some holes with the handle of a mixing spoon, and pour over sundae caramel topping and sweetened condensed milk while it’s still warm. It turns the cake almost fudgy! Once cool, slather with plenty of Cool Whip and scatter bits of crushed Heath bars. This one is truly as good as it sounds!
Steps + Photos to make this recipe for Heath Bar Poke Cake
Step 1: Preheat the oven to 350°F and gather equipment and ingredients. Spray a 9×13-inch baking pan with non-stick cooking spray or use butter and flour to coat.
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Step 2: Prepare the Devil’s Food cake mix according to the package instructions. Pour the batter into the greased pan and bake as you would for a 9×13-inch cake.
Step 3: Once a toothpick inserted into the center comes out clean, remove the cake from the oven with hot pads. While still hot: Use the end of a wooden spoon to poke holes about ½ inch apart across the surface. (See photo below.)

Step 4: Don’t quit now. While the cake is still warm, pour the sweetened condensed milk evenly over the cake, letting it soak into the holes. Use a spatula to coax the milk to every edge, if necessary.

Then drizzle the caramel ice cream topping over the entire surface.

Step 5: Let the cake cool completely to room temperature — about an hour — so it can fully absorb the sweetened condensed milk and caramel.
Step 6: On the full cooled cake: Spread the Cool Whip to every edge.

Sprinkle Heath Bar bits (or a crushed toffee of your choice) generously across the top (use half the bag, or more if you like extra crunch). This topping will soften over time, so if you want that crisp snap in the leftovers too, keep some back to impart new crunch as you plate the leftovers.

Step 7: Slice and serve immediately (though it might be more like a scoop until it chills), or refrigerate until ready to serve. For cleanest slices, let it sit in the fridge for about 45 minutes.

Tips for Success
- Be prepared for an almost “molten chocolate lava cake” gooey experience if serving right away. If you’d prefer cleaner slices, loosely cover the pan and refrigerate for at least 45 minutes.
- Keep back a few handfuls of the Heath Bar bits — the toffee sprinkles soften a bit and adding a sprinkle to each serving of leftovers brings the crunch back.
- Crush full-size Heath Bars in a baggie with a rolling pin if the baking bits aren’t available. Four bars should cover the cake just fine. You can also use any toffee, particularly at Christmas time.
- While devil’s food cake has a sturdy cocoa flavor that helps cut the sweetness of all that caramel and sweetened condensed milk, it’s ok to use any chocolate cake you have on hand. You can even use my recipe for homemade chocolate cake (you won’t need the buttercream frosting, though.)
Want more poke cakes? I got you.
The bottom line
This Heath Bar Poke Cake will rocket caramel and toffee lovers through the stratosphere. Yes, it’s sweet, but the devil’s food cake helps add balance. The whipped topping adds a light, creamy note to every slice. One thing I love about 9×13 cakes is how portable they are, so if you’re ready to make an entrance with dessert, this is the chocolate caramel dessert of your dreams.
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Heath Bar Poke Cake
Equipment
Ingredients
- 1 pkg Devil’s Food cake prepared according to package directions
- 14 oz sweetened condensed milk
- 12 oz caramel ice cream topping
- 8 oz tub Cool Whip or other whipped topping thawed
- 8 oz bag Heath Bar baking bits
Instructions
- Prepare the devil's food cake mix according to package directions, using a 9×13 pan. You'll probably need three eggs, oil and water for this.
- While the cake is still hot: Use the straight end of a wooden mixing spoon, poke holes all over the cake, about half an inch apart. (See photos above.)
- Immediately pour the sweetened condensed milk evenly over the top, letting it soak into the holes. Use the back of a spoon or spatula to gently nudge the milk to all of the edges and to every hole.
- Drizzle the caramel topping slowly over the cake. If the caramel topping is particularly stiff, heat it for 20 seconds or so in the microwave first. Stir and pour over the cake. Again, coax caramel to every hole, if needed.
- Cool completely to room temperature for about an hour.
- On the cooled cake: Spread the thawed Cool Whip edge to edge on top of the caramel.
- Sprinkle about 3/4 of the bag of Heath Bar bits over the top evenly, keeping some back to serve on the leftovers. (If you think there might be leftovers, if not, just add it all.)
- if serving immediately, expect a gooey scoop of cake. For cleaner slices, cover and slide into the fridge for about 45 minutes to help it firm up.
Notes
- For cleaner slices, chill for 45 minutes before serving. Otherwise, this will be a soft, spoonable cake.
- The cake can be kept refrigerated for up to five days.
- If stored overnight, the Heath Bar bits soften in the Cool Whip. Add fresh bits before serving leftovers to bring back the crunch.


Can a cream cheese topping be used instead of the cool whip? This sounds delicious, but I have everything but the cool whip.
Do you have any cream or half and half to help make the cream cheese a bit more like a soft topping? That sounds good. –Andi