The only natural cane sugar I had in the house was a coarse turbinado sugar, so I used that here and it turned out delicious. I will say that the butter and sugar don’t whip up quite as light and fluffy as they would with a finer-grain sugar and that’s why my version isn’t as tall and stately as Emma’s loaf. But I’m not so sure it’s a short coming, really. For the glaze, Emma suggests any dark booze you have: rum, bourbon or brandy. I opted for rum and folded a little into the batter itself. Last, full-fat eggnog is the best choice for this recipe as the lower-fat varieties won’t become nearly as frothy.
Adapted from: Emma Christensen’s recipe for The Kitchn
Heat the oven to 350°F. Line an 8×5 loaf pan with parchment so that the extra hangs over the sides. Spray the parchment and loaf pan with nonstick cooking spray.
In a standing mixer with a whisk attachment or with a hand mixer, beat the eggnog at high speed until it becomes frothy and airy, about 8 minutes. Don’t expect it to actually firm up like whipped cream as it has other ingredients (namely eggs) preventing that. Keep the frothy eggnog in the refrigerator until ready to use.
In a small mixing bowl, whisk together the two flours, baking powder, salt, and nutmeg. Set aside.
Wash the bowl to your standing mixer and fit it with the paddle attachment (or use a hand mixer). Beat the butter at medium speed until it become creamy, 1 to 2 minutes. Scrape down the sides of the bowl and beat in the sugar until the mixture is is smooth and well-incorporated, 2 to 3 minutes. Beat in the eggs and egg yolk one at a time, fully incorporating each before adding the next. Beat in the vanilla and the rum. Scrape down the sides as needed.
Add the flour mixture into the bowl of the stand mixer, and mix on low until the ingredients just come together into a dough. Be careful not to overmix.
Using a spatula, gently fold 1/3 of the whipped eggnog into the batter. Then fold the remaining eggnog into the batter. It will feel pretty loose at first, but don’t worry: just keep gently folding and stirring, and eventually it will form a nice, pourable batter.
Pour the batter into the prepared loaf pan and smooth the top. Place in the oven and bake for 50 to 60 minutes, or until the top is golden-brown and a toothpick inserted into the middle comes out clean. Let cool for 10 minutes, then lift the loaf out by the parchment paper and transfer it to a cooling rack. Remove the parchment.
When the loaf has cooled but is still warm to the touch, whisk together the glaze and spoon over the top of the loaf. Allow the loaf to sit until the icing is set and dry. Slice and serve. Wrap leftovers in plastic wrap and store at room temperature for up to three days.