01 -
Preheat oven to 175°C. Grease a 23x33-centimetre baking pan thoroughly.
02 -
In a large mixing bowl, combine all-purpose flour, milk, white sugar, eggs, baking powder, vanilla extract, and salt until a uniform batter forms. Incorporate the melted butter and mix thoroughly. Pour the batter evenly into the prepared pan.
03 -
In a separate bowl, beat softened butter, brown sugar, all-purpose flour, and ground cinnamon until smooth. Drop the cinnamon mixture by spoonfuls over the batter in the pan.
04 -
Using a knife, gently swirl the cinnamon layer through the batter to achieve a marbled appearance.
05 -
Place the pan in the preheated oven. Bake for 25 to 30 minutes, or until a toothpick inserted in the centre emerges almost clean.
06 -
While the cake bakes, whisk together confectioners' sugar, milk, and vanilla extract in a mixing bowl until glaze is smooth.
07 -
Once the cake is baked and still warm, drizzle the glaze evenly over the surface. Allow to set slightly before serving.