Preheat the oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.

In a mixing bowl, whisk together flour, sugar, baking powder, and salt.

Add softened butter and mix until crumbly.

In a separate bowl, beat the eggs, then add orange zest and orange juice.

Combine the wet ingredients with the dry ingredients and mix until just combined.

Fold in the chopped cranberries gently.

Pour the batter into the prepared cake pan and smooth the top.

Bake in the preheated oven for 40-45 minutes, or until a toothpick inserted in the center comes out clean.

While the cake is baking, prepare the topping by mixing sugar and orange zest in a small bowl.

Once the cake is done, remove it from the oven and let it cool for 10 minutes.

Sprinkle the topping over the warm cake before serving.