Creating the perfect Caramel Pecan Upside-Down Cake is simple when you follow these detailed steps:

Step 1: Prepare the Topping

1. In a saucepan, mix the melted butter, brown sugar, maple syrup, and a pinch of salt. Heat the mixture until the sugar is nearly dissolved.
2. Stir in the pecan halves, ensuring they are well-coated with the caramel mixture.

Step 2: Prepare the Pan

3. Preheat your oven to 360°F (180°C).
4. Grease an 8-inch cake pan and evenly spread the pecan and caramel mixture at the bottom.

Step 3: Make the Cake Batter

5. In a bowl, combine almond milk and lemon juice or vinegar. Let it sit for a few minutes to create a buttermilk substitute.
6. Add the granulated sugar, sunflower oil, and vanilla extract to the almond milk mixture. Stir until the mixture is smooth and well-combined.

Step 4: Combine Dry Ingredients

7. In a separate bowl, whisk together the all-purpose flour, baking powder, cinnamon, and salt.
8. Gradually add the dry ingredients to the wet mixture, stirring until everything is well combined and smooth.

Step 5: Bake the Cake

9. Pour the cake batter over the pecan layer in the prepared pan.
10. Place the cake pan on a baking tray to catch any potential spills.
11. Bake for 40-45 minutes, or until the cake is firm and a toothpick inserted into the center comes out clean.

Step 6: Cool and Serve

12. Allow the cake to cool in the pan for about 30 minutes.
13. Carefully flip the cake onto a serving plate, gently tapping the bottom of the pan to release the cake.
14. Let the cake cool on a wire rack before slicing and serving.