Semla — Sweden's cream-filled cardamom bun for Shrove Tuesday

i. Origin & history

The word semla comes, via German Semmel, from the Latin simila, fine wheat flour. For centuries a semla was simply a bun made from good white flour — a treat in a country that baked mostly with rye — and eating rich food on the day before Lent was the natural moment to enjoy it. Fat Tuesday is fettisdagen in Swedish, and the buns became so tied to it that the day is also known informally as semmeldagen.

Early semlor were plain. A popular older way to eat them was as hetvägg: the bun placed in a deep bowl of hot milk, often with cinnamon and sugar, and eaten with a spoon. The name is thought to derive from the German heisse Wecken, 'hot buns'. The most famous semla story concerns this version: King Adolf Frederick of Sweden died in February 1771 after a very large meal that, by tradition, ended with fourteen servings of hetvägg. The story is told every year, usually with the caution that the dessert was only the final course of an enormous feast.

The modern semla — cardamom-scented bun, almond paste, whipped cream and a lid — took shape in the late nineteenth and early twentieth centuries, as cream and almond paste became affordable and Swedish konditorier refined the recipe. Over the following decades the season stretched, and today semlor appear in bakeries soon after Christmas. Many Swedes still insist on waiting until fettisdagen; others eat them every week of the season. Newspapers publish annual 'semla tests' ranking bakeries, and inventive variants appear every year.

Neighbouring countries have close relatives: laskiaispulla in Finland (often filled with raspberry jam instead of almond paste), fastelavnsbolle in Norway and Denmark, and the Estonian vastlakukkel. The Swedish version, with almond paste mixed with the scooped-out crumb, is the one most people mean by semla.

ii. How a soft bun and a cardamom crumb make the filling work

A good semla bun is soft, light and fairly plain, with a thin, golden crust — it has to carry a lot of cream and almond paste without becoming heavy or dry. That comes from an enriched yeast dough of milk, butter, egg and a little sugar, kneaded well for structure, then given two rises. The second rise, after shaping, is what makes the buns puffy and round; underproved buns are dense and tear when cut.

Cardamom is the defining flavour. Swedish bakers use it freshly ground from the seeds, not pre-ground, because its aromatic oils fade quickly after grinding. Its warm, citrusy, slightly eucalyptus flavour bridges the plain bread and the sweet almond, which is why a semla made without it tastes flat.

The filling technique is the clever part. Instead of simply spreading almond paste, the bun is hollowed out and the scooped-out crumb is mixed with the almond paste and a little milk. The crumb loosens the dense paste into a soft, spoonable filling, flavours it with cardamom, and wastes none of the bun. The filling should be moist but not runny, so it does not soak the base.

The whipped cream goes on last, piped high in a swirl, and the lid sits on top. Assembling just before serving keeps the bun from going soggy and the cream from weeping. Good bakeries bake the buns the same day and fill them to order.

iii. Ingredients

Makes 12 servings · scroll the side panel to adjust

• 250 ml whole milk
• 75 g unsalted butter
• 7 g instant dried yeast
• 60 g caster sugar
• 2 tsp freshly ground cardamom
• ½ tsp salt
• 1 egg, plus 1 beaten egg to glaze
• 450 g strong white bread flour
• 250 g almond paste (mandelmassa, about 50% almonds)
• 100 ml milk, for the filling
• 400 ml whipping cream
• 1 tbsp icing sugar, for the cream
• 2 tbsp icing sugar, to dust

Swedish mandelmassa is almond paste with roughly equal almonds and sugar; marzipan is sweeter and smoother but works, or make your own by blitzing 125 g blanched almonds with 125 g sugar and a little water. Freshly ground cardamom — seeds from about 15 green pods crushed in a mortar — gives the true flavour. Strong bread flour gives a light, springy bun; plain flour works but the buns are slightly less tall. Use whipping cream (about 36–40 per cent fat), which holds its shape when piped. Fresh yeast (25 g) is standard in Sweden and can replace the dried yeast.

iv. Method

1. Warm the milk and butter until the butter melts, then cool to lukewarm (about 37 °C). Stir in the yeast, sugar, cardamom, salt and egg.
2. Add the flour gradually and knead by machine for 8–10 minutes, or by hand for 12–15, until the dough is smooth, elastic and only slightly sticky. Cover and leave to rise in a warm place for 45–60 minutes until doubled.
3. Divide into 12 equal pieces (about 75 g each) and roll each into a tight, smooth ball. Space them well apart on two lined trays, cover and prove for 30–45 minutes until puffy.
4. Heat the oven to 220 °C (425 °F), or 200 °C fan. Brush the buns with beaten egg and bake for 8–10 minutes until deep golden and hollow-sounding when tapped underneath. Cool completely on a rack under a cloth to keep them soft.
5. Cut a lid off each bun, about 1 cm from the top — a triangle is the classic Stockholm style, a flat round lid is equally traditional. Scoop out about a tablespoon of crumb from each base.
6. Mix the scooped-out crumb with the grated or crumbled almond paste and enough milk to make a soft, spreadable filling. Spoon it into the hollows, mounding slightly.
7. Whip the cream with 1 tbsp icing sugar to firm but smooth peaks and pipe a tall swirl on each bun. Set the lids on top, dust with icing sugar and serve straight away.

v. Tips & common mistakes

• Grind the cardamom yourself. Pre-ground cardamom loses most of its aroma; fresh seeds crushed in a mortar make the bun.
• Keep the milk lukewarm. Milk that is too hot kills the yeast. It should feel just warm on your wrist.
• Shape tight balls. A smooth, taut surface makes round, high buns with an even crust. Loose dough spreads into flat discs.
• Do not overbake. Semla buns bake fast at high heat. Overbaked buns go dry and crusty; they should be soft all through.
• Cool under a tea towel. Covering the buns as they cool traps steam and keeps the crust soft.
• Fill just before serving. Cream and almond paste make the bun soggy within hours. Bake ahead, but assemble at the last moment.

vi. Variations

Hetvägg is the old style: a filled semla served in a bowl of hot milk. Finnish laskiaispulla is often filled with raspberry or strawberry jam instead of almond paste. Swedish bakeries compete each year with new variants: semmelwrap (a flattened bun rolled around the filling), chocolate semla, pistachio semla, vanilla semla with custard, and even semla cakes.

For other Nordic cardamom bakes, see the twisted cardamom bun, Norway's custard-filled skolebrød and the Danish æbleskiver. Other famous pre-Lenten treats include Poland's faworki, Germany's Berliner and the Danish klejner.

vii. Serving & storage

Semlor are eaten as a fika treat with coffee or tea, especially on fettisdagen, and in Swedish homes and offices on every Tuesday through the season. They are eaten with a spoon or by lifting the lid and using it to scoop up the cream first.

Unfilled buns keep for a day in an airtight bag, or freeze very well for up to 2 months: thaw at room temperature and warm briefly in the oven before filling. The almond filling can be made a day ahead and kept in the fridge. Filled semlor are best eaten within a few hours and do not keep overnight.

ix. More from Scandinavian

• Cardamom Bun — Swedish kardemummabulle
• Skolebrød — Norwegian custard bun
• Prinsesstårta — Swedish princess cake
• Smultring — Norwegian cardamom doughnuts
• Marzipan — almond and sugar paste
• Berliner — German jam doughnuts