Jam Filled Cupcakes: Soft Vanilla Cakes with a Jam Center

Jam filled cupcakes are soft vanilla cakes with a spoonful of fruit jam tucked inside and a swirl of buttercream on top. The simple filling gives each cupcake a bright, fruity center without making the batter complicated. Use a thick, seedless or seeded jam you enjoy, and let the cupcakes cool completely before filling and frosting them.

Ingredients

1 1/2 cups (180 g) all-purpose flour, spooned into the measuring cup and leveled
3/4 cup (150 g) granulated sugar
1 1/2 teaspoons baking powder
1/4 teaspoon fine salt
1/2 cup (113 g) unsalted butter, softened but not melted
2 large eggs, at room temperature (about 100 g without shells)
1/2 cup (120 ml) whole milk, at room temperature
2 teaspoons vanilla extract (10 ml)
1/2 cup (160 g) thick fruit jam, such as raspberry, strawberry, or apricot, for filling
1/2 cup (113 g) unsalted butter, softened, for the frosting
2 cups (240 g) powdered sugar, sifted if lumpy
1 teaspoon vanilla extract (5 ml), for the frosting
1 to 2 tablespoons (15 to 30 ml) milk or cream, as needed for the frosting
1 small pinch of fine salt, for the frosting

Instructions

Prepare the pan and ingredients. Set a rack in the middle of the oven and heat it to 350°F (177°C). Line a standard 12-cup muffin pan with paper liners. Let the butter, eggs, and milk lose their refrigerator chill while you measure the other ingredients; the butter should yield when pressed but should not look oily or melted.
Combine the dry ingredients. In a medium bowl, whisk together the flour, baking powder, and salt for about 30 seconds so the baking powder is evenly distributed. In a separate large bowl, beat the 1/2 cup (113 g) cake butter with the granulated sugar using a hand mixer on medium speed for 2 to 3 minutes, until pale and fluffy. Scrape the bowl once as needed.
Make the batter. Beat in the eggs one at a time, mixing just until each is incorporated, then mix in 2 teaspoons vanilla. Add about one-third of the flour mixture and mix on low speed until mostly combined. Add half the milk, then another third of the flour, the remaining milk, and the remaining flour, mixing briefly after each addition. Stop as soon as no dry streaks remain; a few small lumps are preferable to overmixing, which can make cupcakes firm.
Fill the liners. Divide the batter evenly among the 12 paper liners, filling each about two-thirds full. A level 3-tablespoon scoop is a useful guide. Tap the pan gently once on the counter to settle the batter, but do not bang it hard enough to push batter up the sides.
Bake and check for doneness. Bake for about 19 minutes, checking at 18 minutes. The tops should spring back when lightly touched, and a toothpick inserted into the cake should come out clean or with a few dry crumbs. If using a food thermometer, check a cupcake in the center without touching the pan; it should reach at least 160°F (71°C), the USDA FSIS safe minimum for egg dishes. Bake for another minute or two if needed, since oven temperatures and pan materials vary.
Cool completely. Let the cupcakes sit in the pan for 5 minutes, then transfer them to a wire rack. Cool for about 40 minutes more, until the centers are no longer warm. Filling warm cupcakes can thin the jam and soften the crumb, while frosting them warm can melt the buttercream.
Fill with jam. Use a small sharp knife, cupcake corer, or the wide end of a piping tip to remove a plug from the center of each cupcake, making a cavity about 1 inch (2.5 cm) wide and 1 inch (2.5 cm) deep. Keep the opening narrower than the cupcake so the sides stay sturdy. Spoon about 2 teaspoons of jam into each cavity, stopping just below the top. Replace a thin piece of the cake plug if you like, or leave the filling exposed beneath the frosting.
Make the buttercream. Beat the remaining 1/2 cup (113 g) softened butter in a clean bowl until smooth, about 1 minute. Add the powdered sugar in two additions, mixing on low so it does not puff out of the bowl. Beat in 1 teaspoon vanilla and a pinch of salt. Add 1 tablespoon (15 ml) milk or cream and beat on medium until fluffy; add the second tablespoon a little at a time only if the frosting needs to loosen. It should hold a soft peak and be easy to spread or pipe.
Frost and finish. Spread or pipe buttercream over each cooled, filled cupcake. A small offset spatula works well if you want a simple finish; a piping bag with a large open star tip makes a taller swirl. If desired, add a tiny dot of jam on top or a few cake crumbs. Serve at room temperature for the softest cake and frosting.

Tips

Measure flour gently. Spoon flour into the measuring cup and level it rather than scooping directly from the bag, which can pack in extra flour and produce dry cupcakes. A kitchen scale gives the most consistent result.
Choose a thick jam. A spoonable preserve works best. If your jam is runny, stir it and use a little less per cupcake so it does not seep through the cake or make the frosting slide. Avoid warming the jam unless it is too firm to spoon, and cool it completely if you do warm it.
Keep the cupcakes intact. Make the cavities small and centered, leaving a substantial cake wall around each one. A corer is convenient, but a small knife works; remove the center gradually rather than cutting all the way through the bottom.
Adjust the frosting, not the cake. If the buttercream is too stiff to pipe, add milk a teaspoon (5 ml) at a time. If it becomes loose, beat in a little more powdered sugar. For a less sweet topping, use a thin layer rather than reducing the sugar substantially, since sugar provides the frosting’s structure.

Serving Suggestions

Serve these cupcakes at room temperature, when the buttercream is soft and the jam is easy to taste. They work well as a birthday or afternoon-tea treat, on a dessert table, or as a small sweet after a casual meal. Arrange them on a platter with the jam flavor visible in a small label or note if you make more than one batch; the cupcakes look similar from the outside even when their centers differ.

For a simple finish, use a light dusting of powdered sugar instead of buttercream, or add a few fresh berries that match the filling just before serving. Keep fresh fruit off cupcakes that will sit out for a long time, since cut fruit releases moisture. Coffee, black tea, or a glass of milk makes an easy pairing without competing with the fruit flavor.

Variations

Change the fruit: Raspberry and strawberry give a familiar sweet-tart center, while apricot or peach makes a gentler, mellow filling. Blackcurrant, blackberry, or sour cherry jam gives a more assertive tang. Use a jam with a texture you like; if it contains large fruit pieces, chop them or press the jam through a sieve so the filling fits neatly into the small cavities.

Try a different cake flavor: Replace 1/4 cup (30 g) of the flour with unsweetened cocoa powder for a light chocolate cupcake, then pair it with raspberry or cherry jam. For a lemon version, add 1 tablespoon (6 g) finely grated lemon zest to the sugar and butter and use lemon curd only if you are comfortable with a softer, richer filling; curd is less stable than jam and the filled cakes should be refrigerated.

Make them without dairy: Use a firm plant-based butter block in place of the butter and an unsweetened plant milk in place of whole milk. Choose a baking-style substitute rather than a soft spread from a tub, which can contain more water and make both the cake and frosting slack. The flavor and frosting texture may vary by product, so add the plant milk gradually.

Skip the piping: A thin coating of frosting spread with a knife is enough to cover the filling opening. You can also leave off the frosting and dust the cooled cupcakes with powdered sugar just before serving. The unfrosted version is less rich and easier to pack, though the sugar may dissolve into the surface over time.

Storage and Reheating

Because these cupcakes contain buttercream and a moist fruit filling, refrigerate them in a covered container within 2 hours of serving. They keep well for up to 3 days in the refrigerator. Set them out for about 20 to 30 minutes before eating so the cake and frosting soften; avoid leaving them at room temperature for more than 2 hours. In a warm room, serve them sooner and return the rest to the refrigerator.

For longer storage, freeze the cupcakes in a single layer until firm, then transfer them to a freezer-safe airtight container for up to 2 months. Thaw them overnight in the refrigerator, still covered, and bring them toward room temperature before serving. The cake may be slightly more moist after thawing, but the jam center generally holds well. Do not microwave frosted cupcakes: the buttercream can melt unevenly. If you prefer a warm cake, warm an unfrosted cupcake briefly and add the filling and frosting after it cools; these are best enjoyed as written at room temperature.

Frequently Asked Questions

Can I use homemade jam?

Yes, as long as it is thick enough to sit in a small cavity rather than run out into the cake. Stir it first and spoon off any separated liquid. Keep homemade jam refrigerated according to its own storage needs, and refrigerate the filled cupcakes as directed here.

Can I fill the cupcakes before baking?

This recipe is designed for filling after baking. Jam placed in the raw batter can sink, spread, or create a damp pocket that makes it harder to judge whether the cake is baked through. Coring the cooled cupcakes gives you a clear, centered filling and keeps the crumb more predictable.

Can I make the cupcakes ahead?

Yes. Bake the cupcakes a day ahead, cool them completely, and keep them covered at room temperature if your kitchen is cool. Fill and frost them the day you plan to serve them for the neatest appearance. You can also assemble them ahead and refrigerate them for up to 3 days; allow time for them to soften before serving.

Why did my cupcakes turn out dense?

Dense cupcakes often come from over-measuring flour, using butter that is melted rather than softened, or mixing the batter for too long after adding flour. Check that your baking powder is fresh, measure flour by weight if possible, and stop mixing as soon as the dry ingredients are incorporated. Also avoid opening the oven repeatedly during the first part of baking.

What if I do not have a cupcake corer?

A small paring knife, a clean round piping tip, or the narrow end of a melon baller can make the opening. Cut or scoop a shallow center, then widen it only as needed for about 2 teaspoons of jam. Save the cake pieces for replacing the tops, tasting, or crumbling over a bowl of ice cream.

Can I use a different frosting?

Yes. Cream cheese frosting pairs nicely with berry or apricot jam, but it is softer and should be kept refrigerated. A simple powdered-sugar glaze also works if you want a lighter finish; drizzle it sparingly over the filled cakes and let it set before packing them. Keep the frosting amount moderate so it does not overwhelm the fruit center.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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