In a mixing bowl, mix the butter, light brown sugar and cinnamon together with a spoon until combined.
Unroll the ready-made puff pastry and spread the cinnamon, butter and light brown sugar mixture evenly over all the pastry leaving a small 1cm gap around the surface. Roll your pastry like a swiss roll.
With a sharp knife or a piece of string, cut the pastry approximately 2cm long.
Place them on the baking tray and bake in the oven for 20 minutes. Leave space in-between each cinnamon swirl as they do expand in the oven whilst baking.
In a small bowl, mix the icing sugar and water together until well combined. Using a spoon or a piping bag, drizzle the icing over each homemade cinnamon swirl in a diagonal motion from top to bottom.
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Notes
Pin For LaterNotes:To freeze them before baking: after you have rolled your puff pastry with the cinnamon filling inside. You can either freeze the pastry as a log or freeze the pastry cut into 2cm sections. Place in a freezer safe bag, a container or wrapped in cling-film for up to 3 months. When you’re ready to eat them continue with the recipe and bake in the oven for 20 minutes or until fully baked and golden brown.To freeze the cinnamon swirls after baking them: Once baked, allow the cinnamon swirls to cool down completely. Take the baking tray with the cinnamon swirls and place them in the freezer until frozen. Once frozen, you can place them in individual freezer bags or in one freezer bag for a month. When you’re ready to eat them reheat them in the oven at gas mark 4/180°C/350°F until warmed thoroughly throughout.To make cinnamon swirls in advance: You can make cinnamon swirls ahead of time! Follow the recipe and store in an air-tight container at room temperature for up to 3 days. Eat them as they are when you are ready or you can heat them in the oven to gently warm them up.