Red-wine and chocolate cake

Very easy to prepare, with an intense flavor. A perfect little chocolate bite to end a Christmas meal.

1. Preheat oven at 170 ºC
2. In a bowl and using a hand mixer, add these one by one, mixing until smooth each time:
   85 g unsalted butter (better if it is already at room temperature)
   + 180 g brown sugar
   + 50 g white sugar
   + 1 large egg + 1 large egg yolk
   + 175 mL red wine
   + 5 mL vanilla extract
3. In a second bowl, mix together, using a sieve:
   135 g wheat flour
   + 40 g pure cacao powder
   + 1 sachet baking powder
   + 1/4 teaspoon salt
   + 1/4 ground cinnamon
4. Pour the dry ingredients over the wet batter and mix well together until homogeneous.
5. Transfer to a greased 20 cm baking tin.
6. Bake for 30 to 35 minutes, until fully cooked inside.
7. Let the cake cool down and sprinkle some caster sugar on the top.

I learnt this from Smitten Kitchen.