Start by pouring fresh apple cider into a wide, shallow saucepan. Heat over medium heat, allowing it to simmer gently. Stir occasionally and let it reduce by half, about 10-15 minutes.

Once reduced, remove cider from heat and stir in melted butter. Allow the mixture to cool for about 5 minutes.

In a large bowl, whisk the eggs, light olive oil, and sour cream together until smooth.

Slowly pour the cooled cider and butter mixture into the wet ingredients, mixing gently.

In a separate bowl, whisk together flour, sugar, baking soda, baking powder, and cinnamon.

Gradually add the dry ingredients to the wet mixture, folding gently until just combined.

Preheat your oven to 350°F (175°C). Line a baking dish with parchment paper and pour in the batter. Bake for 22-25 minutes.

Remove from the oven and let cool for about 5 minutes. Brush the top with melted butter and sprinkle cinnamon sugar generously.