01 -
Preheat oven to 350°F (180°C) and grease a 9-inch round cake pan thoroughly.
02 -
In a large bowl, combine flour, granulated sugar, baking powder, and salt until well incorporated.
03 -
In another bowl, whisk eggs, Greek yogurt, vegetable oil, and vanilla extract until smooth.
04 -
Gradually mix the wet ingredients into the dry mixture until a smooth batter forms.
05 -
In a small bowl, combine brown sugar, softened butter, and ground cinnamon into a spreadable paste.
06 -
Pour one-third of the batter into the prepared pan, spoon over cinnamon swirl mixture, and use a knife to create a gentle marbled effect. Repeat layering until all batter and cinnamon mixture are used.
07 -
Bake in preheated oven for 30–45 minutes or until a toothpick inserted in the center comes out clean.
08 -
Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
09 -
Whisk powdered sugar, milk, and vanilla extract together until smooth and pourable.
10 -
Once the cake is fully cooled, drizzle the glaze evenly over the top before serving.