Method
Mix the instant coffee and hot water in a small bowl and set aside.
 In a chopper, combine room-temperature butter and sugar. Blend until smooth. Add the egg and vanilla extract, and mix again.
 Transfer the mixture to a bowl, sift in the cake flour, and gently fold with a silicone spatula until combined.
 Place the coffee cream into a piping bag.
 Hollow out each dinner roll slightly. Add about 8 g of unsalted butter and a pinch of salt inside. Place the top back on.
 Pipe the coffee batter over the top of each roll.
 Bake in a preheated oven or air fryer at 180°C (355°F) for 8–10 minutes, until the top is crispy and golden.
 
Coffee Bun 커피번
The easiest recipe for coffee buns using dinner rolls.
 Sweet coffee buttercream and butter make the best harmony!