How to make coffee banana cake step by step?

Step 1 - preparations

• Take out the eggs, butter, and yogurt from the fridge earlier to warm up to room temperature.
  100 g butter, 2 eggs, 100 ml Greek yogurt
• Line the baking pan with parchment paper or grease with butter and sprinkle with flour or breadcrumbs.
  
• Peel the bananas and mash thoroughly with a fork.
  approx 200-230 g bananas
  
• Mix together the dry ingredients for the cake (except for sugar).
  300 g wheat flour, 1 teaspoon baking soda, 0,5 teaspoon salt, 1 teaspoon cinnamon
  
• Brew the coffee and set aside to cool slightly.
• Turn on the oven to heat to 170℃ (fan-forced) or 180℃ (top/bottom heat mode).

Step 2 - preparing the coffee banana cake

• Transfer butter and sugar to a large bowl and start mixing.
  100 g butter, 200 g powdered sugar
  
• Beat for about 3 minutes on high speed with a mixer until the mixture becomes light in color and noticeably fluffy.
  
• Then add one egg at a time to the bowl and one tablespoon of mixed flour - mix briefly on low speed with a mixer.
  2 eggs
  
• Add about half of the flour and mix briefly.
  
• Add the yogurt and mix briefly on low speed.
  100 ml Greek yogurt
  
• Add the espresso and mix briefly.
  approx 40 ml espresso
  
• Add the mashed bananas to the bowl and the rest of the flour and mix only until combined - stop mixing when you still see remnants of flour and then just fold the batter with a spoon.
  
• Transfer the dough to the prepared baking pan.
  

Step 3 - baking the cake

• Place the pan with the cake into the preheated oven and bake for about 30 minutes - until a dry stick (skewer) comes out clean.
• After baking, cool the cake completely.

Step 4 - preparing the coffee mascarpone cream

• Transfer the cream ingredients to a bowl and mix them together at high speed.
  250 g mascarpone cheese, 150 ml heavy cream, 1 teaspoon instant coffee, approx 30 g powdered sugar
  
• Mix until you get a thick and stable cream - about 2-3 minutes.
  
• Spread the cream over the cooled cake.