Chocolate quinoa cake with peanut butter frosting

Name: Chocolate quinoa cake with peanut butter frosting
Prep time: 15 min
Cook time: 2 h 10 min
Total time: 2 h 10 min
Yield: 12 slices
Ingredients: 120 g butter; 170 g red quinoa; 520 g water; 4 eggs; 80 g milk; 1 tsp vanilla bean paste; 250 g caster sugar; 30 g cocoa powder; 1 ½ tsp baking powder; 1 pinch salt; 120 g cream cheese; 60 g peanut butter; 1 tsp vanilla bean paste; 120 g icing sugar