• 150 grams of Blue Key flour
• 50 grams of granulated sugar
• 1/2 teaspoon of salt
• 85 grams of unsalted butter
• 300 ml of full-cream milk
• 1 egg
• 1 tablespoon of plain yogurt
• 1/2 teaspoon of baking powder
• 30 grams of powdered sugar
• 1 teaspoon of ground cinnamon
• Butter