Cinnamon Coffee Cake

Preheat the oven at 170 C / 340 F

Grease and line with parchment paper a 9-inch round baking pan or a 8 x 8-inch square baking pan

Combine dry ingredients – flour, salt, baking powder, and baking soda – set aside.

Cream butter and sugar until light and fluffy.

Add egg and egg yolk

Followed by the vanilla extract.

Next, alternate the flour mixture and the buttermilk

Scrape the bottom and sides of the bowl to ensure you have a smooth batter.

Pour batter into the prepared baking pan.

For the topping – combine sugar, flour, and cinnamon.

Spread over the batter as evenly as possible

Bake in the preheated oven for about 25 to 35 minutes or until a skewer inserted in the center comes out clean.

Let cool in the pan for at least 10 minutes before you slice and serve.