Preheat the oven to 350°f.
In a large mixing bowl combine 3 large eggs (room temperature), and ½ cup pumpkin puree,1 teaspoon cinnamon, and1 teaspoon vanilla extract. Slightly whisk to combine.
Then, add 1 (14 oz) can sweetened condensed milk, 1 (12 oz) can evaporate milk, and ½ teaspoon nutmeg, or pumpkin spice and whisk until all ingredients are well combined.
Next, pour the custard mixture into the baking pans with the caramel (in my case equally divided into two). And now the other important step, please don't skip this: The baño de maria which is pouring enough hot water into the large baking sheet to come halfway to the top. This is an essential part of making the flan.
Place them in the oven for about 50 to 60 minutes.
After 50 minutes has passed, remove from the oven and out of the large baking pan with hot water. Place them in a cooling rack or as I did on two kitchen mittens over the counter and let them cool down completely. Then cover with plastic wrap and chill in the refrigerator until ready to serve.
When ready to serve, use a small knife to carefully loosen the edges of the flan. Then, carefully invert into a serving plate, ideally with edges or big enough, as there is a lot of caramel. Did I mention that's my favorite part :)