1. Preheat your oven to 350°F (175°C). Grease a 9-inch round cake pan and line the bottom with parchment paper.
2. In a large bowl, cream together the butter and sugar until light and fluffy, about 3-4 minutes. This step is crucial for a tender cake, so don’t rush it!
3. Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract and orange zest, letting the citrusy aroma fill your kitchen.
4. In a separate bowl, whisk together the flour, baking powder, baking soda, and salt.
5. Gradually add the dry ingredients to the wet mixture, alternating with the orange juice and sour cream. Begin and end with the flour mixture, mixing until just combined. Overmixing can lead to a denser cake, so be gentle!
6. Fold in the cranberries gently with a spatula. Pour the batter into the prepared cake pan, smoothing the top with a spatula.
7. Bake for 45-50 minutes, or until a toothpick inserted into the center comes out clean. Let it cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.

One tip from my abuela’s kitchen: always let baked goods cool completely to enhance their flavor and texture. Patience is key!