Creating your Cranberry Pineapple Upside Down Cake can be straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9-inch round cake pan or a cast-iron skillet.
2. Prepare Topping: In the prepared pan, pour the melted butter evenly over the bottom. Sprinkle the brown sugar over the butter.
3. Arrange Pineapple: Place the sliced pineapple on top of the brown sugar, arranging it in a circular pattern. Scatter the cranberries over the pineapple slices.
4. Mix Wet Ingredients: In a large mixing bowl, whisk together the granulated sugar, eggs, and vanilla extract until well combined.
5. Combine Dry Ingredients: In another bowl, sift together the flour, baking powder, baking soda, and salt.
6. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, alternating with the buttermilk. Mix until smooth and no lumps remain.
7. Pour Batter: Carefully pour the batter over the arranged pineapple and cranberries in the pan.
8. Bake: Place in the preheated oven and bake for 35-40 minutes or until a toothpick inserted into the center comes out clean.
9. Cool: Once baked, remove the cake from the oven and let it cool in the pan for about 10-15 minutes.
10. Invert Cake: Carefully invert the cake onto a serving plate, allowing the pineapple and cranberries to be on top.

These steps will guide you in creating this incredible cake effortlessly!