- Preheat the oven to 350°F. Line the bottom of a 9 x 5 inch loaf pan with parchment paper. In the bowl of a stand mixer (or use a hand mixer), beat together the butter, sugar, salt, vanilla, baking powder, espresso powder, and cocoa. The mixture will seem a bit grainy/sandy. Add the eggs one at a time being sure to fully mix each egg in before adding the next. Add half of the flour and mix on low speed until combined. Add the milk and mix until combined. Add the rest of the flour, mixing just until combined.
- Pour batter into the loaf pan and bake for 60 to 70 minutes or until a toothpick inserted into center comes out clean. Check loaf at the 55 minute mark and every 5 minutes after to avoid drying out the cake. Once cooked, loosen the edges of the cake with a knife or thin spatula. After 10 minutes of cooling time, remove loaf from the pan and cool on a wire rack. Wrap cooled loaf in plastic wrap and store at room temperature. Slice and enjoy after it sits several hours, preferably overnight or more.