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Boston Cream Layer Cake with Chocolate Glaze

Bake a vanilla layer cake with cooked pastry cream and dark chocolate glaze. Precise 9-inch pan instructions, chilling advice and printable recipe.

5 hr 10 min including cooling / setting12 servings
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Boston Cream Layer Cake with Chocolate Glaze
AI-generated food illustration. Actual prepared dishes may differ.

About this recipe

A layered celebration dessert with a source-based formulation and an English preparation guide. Ingredient ratios and pan sizes were checked against the credited recipe; Best Quick Recipe has not independently baked this version. The image is an AI-generated illustration, not a photograph of a tested batch.

What is Boston cream cake?

Despite the traditional name Boston cream pie, this dessert has baked cake layers rather than a pastry crust. A cooked milk-and-egg filling separates the two vanilla layers, and chocolate forms a thin topping. It is a useful introduction to layered desserts because it has fewer components than a frozen entremets. There is no need to split the baked layers, make a fruit insert or buy a specialist setting agent.

Preparing a tidy custard workstation

Set the sieve, heatproof container and covering material beside the stove before heating the milk. Keep the whisk within reach and use a saucepan with enough room to whisk without splashing. Separate the yolks into a small bowl first so a broken shell does not end up in the pan. As with any hot milk mixture, turn pot handles away from the edge and protect your hands when moving the saucepan.

Before you start: weigh and organise

Read the whole card before opening the ingredients. Set out one bowl for each component and label similar-looking quantities, especially sugar and cream. Weigh in grams where a weight is given; use level measuring spoons for small amounts. A tablespoon means 15 ml and a teaspoon 5 ml. Prepare the specified pans before mixing. Check that your cooling rack, cake board and refrigerator shelf have enough room for the finished cake. Keep eggs and dairy out only as long as needed for preparation.

A photograph is a guide, not a doneness test

The illustration shows the intended style, but it cannot tell you whether your actual cake is cooked or its filling has set. Use the checks in the instructions. Oven settings, pan material and the size of your eggs can change a baking time. Check near the beginning of the stated range and avoid opening the oven repeatedly. A skewer should test sponge, not a pocket of fruit or melted chocolate. Never taste uncooked batter containing raw flour or eggs.

Ingredient requirements and allergens

There is no gelatin, pork or alcoholic drink in this formulation. Where vanilla or coconut flavouring is listed, use a product explicitly labelled alcohol-free rather than ordinary alcohol-based extract. Check packaged chocolate, wafers, cream cheese and flavourings for ingredients suitable for your needs. The recipe is not a halal certification. It contains eggs, milk and wheat unless otherwise indicated; read every label for additional allergens and cross-contact information.

Portioning and serving

Place the cake on a firm, level serving surface. Use a long sharp knife and wipe the blade between cuts; warm water helps clean it, but dry the blade before the next slice. Serve small portions of a rich celebration cake and return the rest to the refrigerator promptly. Keep refrigerated at 4°C / 40°F or below. For home preparation, this guide uses a conservative two-day refrigerated storage recommendation. Use a covered cake box so the filling is protected from strong refrigerator odours.

Avoiding sliding layers

Put the lower sponge flat side down on a stable plate. If the upper sponge has a pronounced dome, trim it carefully once cool. Use an offset spatula to spread the filling rather than pushing hard with the cake layer. Keep the finished cake level while chilling and do not put heavy decorations on top. If the custard is still warm or fluid, return it to the refrigerator rather than trying to hold the layers together with skewers.

Recipe at a glance

Boston Cream Layer Cake with Chocolate Glaze takes about 5 hr 10 min: 40 minutes of preparation and 35 minutes of cooking, plus approximately 3 hr 55 min for cooling, setting or thawing. The recipe makes 12 servings. Follow the ingredient quantities and cooking steps in the printable card below.

BEST QUICK RECIPE · RECIPE CARD

Boston Cream Layer Cake with Chocolate Glaze

Bake a vanilla layer cake with cooked pastry cream and dark chocolate glaze. Precise 9-inch pan instructions, chilling advice and printable recipe.

Prep40 min
Cook35 min
Cooling / setting3 hr 55 min
Total5 hr 10 min
Servings12
Recipe source: Charlotte Rutledge — King Arthur Baking, Boston Cream Pie

Based on the published two 9-inch cake formulation, with alcohol-free vanilla flavouring specified. No rum is included. Ingredient quantities are retained; Best Quick Recipe has not independently kitchen-tested this version.

Ingredients

19 items

Check off ingredients as you prepare them.

Instructions

10 steps
  1. Heat the oven to 325°F / 163°C conventional. Grease two 9-inch / 23 cm round pans and line the bases with baking paper. Use separate bowls for the cake eggs and the pastry-cream eggs.

  2. Beat the cake sugar and four eggs for about two minutes until light and aerated. Slowly mix in the oil. Add flour, salt and baking powder; mix only until incorporated, scraping the base of the bowl.

  3. Heat 227 g milk and 57 g butter just to the boil. Remove from the heat, stir until the butter melts and add the cake vanilla. Gradually mix the hot liquid into the batter. The finished batter is thin; do not add flour to thicken it.

  4. Divide evenly between the pans. Bake 30–35 minutes until the tops are set and a central skewer comes out clean. Cool in the pans for 10 minutes, then turn onto racks to cool completely.

  5. For the pastry cream, heat 454 g milk with the 99 g sugar and 1/4 tsp salt until simmering. Separately whisk the cornstarch, three yolks, one whole egg and remaining 113 g milk until smooth.

  6. Slowly whisk about half the hot milk into the egg mixture. Pour this back through a sieve into the saucepan. Bring to a low boil over medium heat, whisking continuously, and cook for two minutes after the low boil begins. The cream should become distinctly thick.

  7. Remove from heat and stir in the pastry-cream vanilla. Transfer promptly to a shallow heatproof container, cover the surface and refrigerate until fully cold. Do not assemble with warm custard.

  8. Set one completely cooled cake on the serving plate, spread with the cold pastry cream and add the second cake. Refrigerate while preparing the topping.

  9. Gently heat 57 g cream with the 57 g chopped chocolate, stirring until smooth. Add the topping vanilla. Cool about 10 minutes until slightly thicker and no longer hot, then spread over the cake top, allowing a few drips at the edge.

  10. Refrigerate until serving. Allow the glaze to settle before slicing, wipe the knife between portions and return leftovers to the refrigerator. Use within two days under this site’s conservative storage guidance.

Cooking note: Cooking times are estimates. Follow safe food-handling practices, check doneness with a food thermometer when appropriate, and always review ingredients for allergens.

Helpful cooking tips

Frequently asked questions

Does this cake contain rum?

No. This formulation specifies alcohol-free vanilla and includes no rum or liqueur.

Why does the pastry cream need a low boil?

The cornstarch-based cream must be cooked as described in the card. It is not the same method as a pourable egg custard that is never boiled.

Can I frost it before the cakes cool?

No. Both cake and filling must be completely cool before assembly.

Is the topping a mirror glaze?

No. It is a simple chocolate-and-cream glaze.

Can I substitute instant custard powder?

Not within the published quantities. This card uses eggs and measured cornstarch.

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