Saucy Chocolate Cake

• 3/4 packed brown suagr (light)
• 425 ml boiling water
• 180 ml milk
• 130 gr all-pupose flour
• 100 gr sugar
• 28 gr butter
• 28 gr unsweetened cocoa powder
• 9 gr baking powder
• 4 gr vanilla
• 1 gr salt