Combine the water, yeast and 1 teaspoon of sugar in the bowl of a stand mixer and set aside for around 5 minutes to dissolve and become frothy.: As you mix these, you should see small bubbles form on the surface and the liquid will smell slightly yeasty and sweet, signaling that the yeast is alive; this foamy head is what gives the dough its lift and lightness. I like to rest the bowl in a slightly warm corner so the yeast gets comfortable, and if no foam appears within 10 minutes it usually means the yeast is inactive, so check your packet or the water temperature. A common mistake is using water that is too hot, which kills the yeast , so aim for pleasantly warm to the wrist; visually, you want a frothy cap that looks a bit like beer head.
Add the rest of the ingredients to the bowl, but only 3 of the 4 cups of flour. Fit a paddle attachment and lightly mix until just combined.: The bowl will start to look shaggy and slightly sticky at this stage, with clumps of enriched dough coming together; the initial mixing hydrates the flour and incorporates the eggs , milk , and softened butter . I prefer the paddle for this early phase because it brings the ingredients together gently, preventing overworking the gluten too soon. Watch texture closely, because if you add all the flour at once the dough will be too stiff and dry, making it hard to knead.
Change to a dough hook attachment and mix. While this is going, slowly add the remaining 1 cup of flour, and continue to mix until you have a smooth dough, about 5 minutes.: You will hear the dough change from a ragged scrape to a quieter, elastic knead, and visually it develops a sheen as the gluten forms; the surface should become smoother and slightly tacky but not sticky. I watch for the dough to clean the bowl sides, that little visual cue that indicates proper gluten development. The trap here is overmixing, which can make the buns tough, so stop when the dough is pliable and springy to the touch.
Shape the dough into a large ball and grease the mixing bowl with butter. Roll the ball in the butter to coat all sides. Place the ball in the greased bowl, cover with plastic cling wrap and set aside in a draft-free, warm area to rise for about 1 – 2 hours. You want it to double in size. If it is cool, this could take up to 4 hours.: The dough will gradually puff, its surface becoming smoother and slightly domed as air pockets grow; it should roughly double in size, which signals that fermentation has progressed and flavors have developed. I like to mark the bowl with a rubber band so I can tell when it has doubled. If it takes much longer than the window, the room may be too cool; alternatively, if it rises too fast, you may lose some of the nuanced flavor that a slower ferment gives you.
Tip the dough onto a floured surface and roll into a rectangular shape about 45 cm long and 30 cm wide. Brush / spread the softened butter over the entire surface and sprinkle the sugar and cinnamon filling evenly over this. Scatter the raisins over the sugar.: The dough will feel pillowy under your hands and the act of rolling releases a faint yeasty sweet aroma, while the cinnamon and muscovado sugar perfume the air; spreading softened butter ensures the filling adheres and creates those rich layers when rolled. I work from the center out to avoid tearing the dough; if your dough resists stretching, let it rest a few minutes to relax the gluten. A misstep is over-flouring the surface, which can dry the dough and reduce tenderness.
Starting from the longest edge, roll the dough and filling up until you have a long log. Keep the join seam underneath. Trim the edges of the roll and then cut it into 16 even pieces.: As you roll, you should feel the layers compress, and visually the spiral pattern becomes clear at the ends; a neat seam underneath helps the log hold shape while slicing. I measure gently with a ruler or visual markers so the buns bake evenly; trimming the ends removes any uneven filling distribution. Cutting with a sharp serrated knife or strong thread prevents squashing the log, a common error that can flatten the swirls.
While the dough is proving, to make the filling. Combine all the ingredients except the butter and mix. Set aside.: The filling comes together into a grainy, aromatic mixture where cinnamon and muscovado sugar dominate, and the added candied peel or spices add nuance; mixing dry first ensures even distribution when spread. Keep it covered to prevent drying, and taste a tiny pinch to make adjustments if needed, balancing sweetness and spiciness. One misstep is adding wet ingredients too early, which can make the filling slurry-like and harder to roll cleanly.
While the dough is proving, make the topping. Melt the butter in a small pot over medium heat, and then add all the other ingredients except the salt. Bring this mixture to the boil and then reduce the heat to medium. Simmer until the sauce comes together and is golden brown with a nice sheen, about 3–4 minutes.: The pan will sizzle gently as the butter and sugars marry, releasing a toffee scent; as it boils briefly the mixture darkens to a golden brown and develops glossy body. I stir constantly, watching for a uniform sheen, and simmer until it slightly thickens, about a few minutes. The common trap is letting the sugars burn, which creates bitterness, so lower heat at the first sign of deepening color.
Pour 3/4 of the glaze into baking pan (about a 23 cm x 32 cm), or 2 smaller dishes, and swirl this around to evenly coat the bottom and some of the sides. Set the rest aside. Sprinkle the raisins over the sauce evenly.: You want a syrup that coats the back of a spoon and glistens under light, the aroma shifting toward caramel and toffee. This glossy stage means the glaze will set but still be pourable; remove from heat if it gets too dark. If it looks grainy, it may have crystallized from stirring too vigorously, in which case you can gently rewarm and stir until smooth.
Place the 16 cut slices of cinnamon rolls on top of the caramel and raisins, allowing some space in between for expansion during proving. Cover with a tea towel and allow to prove in a warm spot for about an hour.: The warm glaze will pool and mirror light at the pan bottom, and when you scatter the raisins they sink slightly into the syrup, anchoring fruit to each bun. I tilt and rotate the pan to ensure an even layer, because uneven glaze leads to some buns with too much or too little caramel. Pour carefully to avoid splashes on the oven rack later, and wipe any drips.
Preheat the oven to 180 C / 350 F and bake the buns for 35 minutes until golden brown. If necessary, and to prevent over-browning, loosely cover the tray with tin foil from about 10 – 15 minutes into the baking time.: The rolls will swell and look pillowy as the yeast reactivates, and the dough surface becomes smooth and slightly taut; this second prove builds loft and a tender crumb. I check by pressing lightly; if the indent springs back slowly, they are ready. Overproofing leads to flat buns that collapse in the oven, while underproofing yields dense centers, so timing matters.
Remove from oven and spread the remaining glaze over the buns followed by the 1/4 teaspoon of salt sprinkled. Allow to cool in the pan on a cooling rack. Tip out onto a large serving place and serve warm or at room temperature.: During baking you will notice a rich caramel aroma and the tops will deepen to a golden sheen; the filling will bubble slightly at the sides, and the buns should sound hollow when tapped lightly. If the tops darken too quickly, tent loosely with foil after 10 to 15 minutes to allow the centers to finish cooking without burning the surface. A typical error is not preheating the oven, which affects rise and crumb structure.
Mix all the frosting ingredients and beat until smooth and then drizzle over the buns.: The foil softens the direct heat and helps the interior cook through without an overly dark crust, preserving an even golden color. I remove the foil for the last few minutes if I want extra sheen on the top. Be cautious to tent and not press foil onto the buns, as that can mar the surface texture.
Remove from oven and spread the remaining glaze over the buns followed by the 1/4 teaspoon of salt sprinkled. Allow to cool in the pan on a cooling rack: The residual heat helps the glaze seep into the rolls, creating a sticky, glossy top; the small measure of salt brightens the sweetness and rounds the flavor. Cooling in the pan preserves the drippy edges, and you will see a gentle sheen form as the glaze sets. If left too long before glazing the top may not adhere as well, so apply while warm.
Tip out onto a large serving place and serve warm or at room temperature: When inverted, the buns reveal a lacquered top and pockets of caramel around each roll; warm servings maximize the gooey texture and accentuate the aromas. I prefer serving slightly warm so the glaze is glossy and the centers are tender, but they remain lovely at room temperature. Avoid reheating in a way that dries them, instead use a gentle oven or microwave with a damp paper towel for moisture retention.
Mix all the frosting ingredients and beat until smooth and then drizzle over the buns: The frosting becomes silky and pale, adding a tangy counterpoint from the cream cheese and a sweet cloak from the icing sugar . Drizzle while the buns are warm for a soft, slightly melted finish, or wait until cooled for a firmer set. If the frosting is too thick, add milk one teaspoon at a time until pourable, and if it is lumpy, beat longer to smooth.