Boston cream poke cake has soft yellow cake, cool vanilla pudding tucked into the crumb, and chocolate frosting across the top. It bakes in the same pan you’ll bring to the table, so there’s no stacking or decorating to worry about. Cut it into squares and you have a dessert that’s easy to share.
This version uses yellow cake mix, instant vanilla pudding, and prepared chocolate frosting. Most of the work is familiar: mix a batter, bake a cake, and whisk a bowl of pudding. The difference is what happens after baking. Spoon-handle holes give the pudding somewhere to go, while a good chill keeps the filling in place when you add the chocolate.
Before you start
Set out a 9×13-inch baking dish, a mixing bowl, a whisk, and a wooden spoon with a rounded handle. A flexible spatula helps with both the pudding and the frosting. Check the cake-mix box for its extra ingredients before opening anything; the eggs, oil, and water can vary by brand.
Give yourself a generous afternoon for this cake. The hands-on work is short, but the cake needs to cool completely and then chill for several hours. Filling or frosting it too soon makes the layers harder to manage. The times in the recipe card are planning estimates, with the package directions taking priority for baking.
What to buy
- One box of yellow cake mix: choose a mix with directions for a 9×13-inch cake, and gather the ingredients it calls for. Yellow cake gives this dessert its familiar golden crumb.
- Two small boxes of vanilla instant pudding: use the standard four-serving boxes, commonly 3.4 ounces each. This recipe pairs the two boxes with 4 cups of milk. Choose instant pudding for this method.
- Four cups of cold milk: keep the milk cold until you whisk the pudding. Regular whole or 2% dairy milk is a straightforward choice; check the pudding package before using a different kind.
- One container of chocolate frosting: ready-to-spread frosting makes the finishing step easy. It should soften enough to move across the pudding without needing much pressure.
Keep the cake-mix additions separate from the 4 cups of milk for the filling. Prepare the batter with the quantities printed on its box, then use the milk listed here only for the pudding.
Build the cake in three stages
1. Bake the base and let it cool
Grease the baking dish and heat the oven to 350°F, unless your cake-mix package gives a different temperature for that pan. Mix the batter as directed. Scrape it into the dish and spread it into the corners so the cake bakes evenly.
Use the baking time on the box rather than treating the estimate in the card as a deadline. Check the center with a toothpick near the end of that window. It should come out without wet batter, and the cake should look set across the middle.
Let the cake cool completely in the dish. Leave it intact; you don’t need to turn it out onto a plate. A cooled cake is easier to poke without tearing large chunks out of the crumb.
2. Poke, fill, and chill
Make the holes before mixing the pudding. Use the rounded handle of the wooden spoon, spacing the holes roughly an inch apart. Press well into the cake without pushing against the bottom of the dish. The rows can be a little uneven; what matters is giving each serving several pudding pockets.
Whisk both pudding mixes with the cold milk until smooth, following the package’s mixing directions. Let it begin to thicken, but spread it while it still flows easily. Waiting until it has fully set makes it harder to fill the holes.
Spoon the pudding across the cake, gently nudging it into the holes as you go. Spread the remaining pudding over the surface. Work slowly with light pressure so you fill the cake without scooping up crumbs.
Cover the dish and refrigerate for at least 3 hours, or until the filling is set and the cake is thoroughly chilled. This pause gives you a steadier surface for the chocolate topping.
3. Finish with chocolate
Transfer the frosting to a microwave-safe bowl. Warm it for 15 seconds and stir. If it’s still stiff, repeat in short 15-second bursts, stirring each time. Stop as soon as it spreads easily; it doesn’t need to be hot.
Add the softened frosting over the chilled pudding and ease it toward the edges with a spatula. Short, gentle strokes work better than pressing firmly. Leave a few soft swirls if you like, then serve chilled or give the topping a little more time in the refrigerator to firm up.
Cutting and serving
Cut the cake into 12 pieces with a clean knife, wiping the blade between cuts. Slide a spatula underneath each square rather than pulling it out by the frosting. A little pudding along the cut edges is part of a poke cake’s texture, so the slices don’t need to look perfectly tidy.
The cake is rich enough to serve on its own. A small plate and a cup of coffee make an easy pairing, and leaving the top plain lets the chocolate frosting do the decorating.
Questions before you bake
Can I use white cake mix?
Yes. Use a mix intended for the same pan size and follow its package directions. The crumb will be paler, but vanilla pudding and chocolate frosting still work well with it.
Why is the pudding sitting mostly on top?
The holes may be too narrow, or the pudding may have thickened before you added it. Make spoon-handle holes first, then whisk the pudding. Guide it gently into the openings while it is still pourable.
Why is my frosting lifting the pudding?
The filling may need more chilling, or the frosting may be too stiff. Let the pudding set fully, soften the frosting just enough to spread, and use a light touch instead of dragging the spatula through the filling.
Boston Cream Poke Cake
Equipment
- 9×13-inch baking dish
- Mixing bowl and whisk
- Wooden spoon with a rounded handle
- Flexible spatula
- Microwave-safe bowl
Ingredients
- 1 box yellow cake mix Choose a mix with directions for a 9×13-inch pan.
- Ingredients required by the cake mix Use the eggs, oil, water, or other additions listed on your package.
- 2 small boxes vanilla instant pudding mix Standard four-serving size, commonly 3.4 ounces each.
- 4 cups cold milk For the pudding filling.
- 1 container chocolate frosting Ready-to-spread.
Instructions
- Grease a 9×13-inch baking dish. Heat the oven to 350°F, unless the cake-mix package gives a different temperature for your pan.
- Prepare the yellow cake batter with the ingredients and directions on its package. Pour into the prepared dish and spread evenly. Bake for the package’s recommended time, until a toothpick inserted in the center comes out without wet batter. The 30-minute cook time is an estimate.
- Leave the cake in the baking dish and let it cool completely before filling. Allow about 1 hour for planning; the time can vary.
- Use the rounded handle of a wooden spoon to make holes roughly 1 inch apart across the cooled cake. Press well into the sponge without pushing against the bottom of the dish. Make the holes before whisking the pudding.
- Whisk the two small boxes of vanilla instant pudding mix with 4 cups of cold milk, following the package’s mixing directions. Let it begin to thicken, but use it while it is still pourable rather than waiting until it fully sets.
- Spoon the pudding over the cake, gently guiding it into the holes. Spread the remainder across the surface. Cover and refrigerate for at least 3 hours, or until the pudding is set and the cake is thoroughly chilled.
- Transfer the chocolate frosting to a microwave-safe bowl. Warm for 15 seconds and stir, repeating in short 15-second bursts only until it spreads easily. It should not be hot. Gently spread over the chilled pudding with light spatula strokes.
- Cut into 12 pieces, wiping the knife between cuts. Lift each square with a spatula. Serve chilled, or refrigerate briefly after frosting if you want the topping a little firmer.
Notes
Another dessert for the table
For another chilled dessert with vanilla filling and chocolate on top, try No-Bake Chocolate Eclair Cake. If you’re in the mood for a chocolate cake with coconut and pecans, take a look at German Chocolate Cake.