¾ cup (100g) coarsely chopped walnuts + a few extra for the topping
For the coffee glaze
1 cup (130g / 4.5oz) powdered sugar
2 tablespoons (30ml) Kahlúa coffee liqueur (or according to taste)
½-1 tablespoon brewed coffee, cooled (or according to taste)
Instructions
Make the cake
Preheat the oven to 350℉ / 180℃.
Butter the pan and then line it with parchment paper. Set it aside.
In a large bowl, combine the flour, cinnamon, baking powder and salt. Set it aside.
In another bowl, beat the butter and sugar together for about 5 minutes, until everything is well-combined and fluffy.
Add the vanilla, coffee powder, Kahlua (if using) and the eggs, one at a time, beating well after each addition. Scrape the sides of the bowl as needed.
Gradually add the flour mixture and the milk alternately to the butter mixture (I do it in 2 parts). Continue beating on high speed until thoroughly combined.
Fold the chopped walnuts into the batter.
Pour the batter into the prepared loaf pan.
Then bake the cake for 50-60 minutes, or until a toothpick inserted in the middle comes out clean. When done, take it out of the oven and let it cool in the pan for about 10-15 minutes. Then transfer it to a wire rack to cool completely before topping it with the coffee glaze.
Make the coffee glaze
In a small bowl, whisk together the powdered sugar, coffee and Kahlua together until it's smooth. Add more powdered sugar for a thicker consistency. Feel free to add more coffee or Kahlua according to your taste.
Pour the glaze over the cooled cake and top with more chopped walnuts, if desired.