Preheat the oven to 350 F.
The baking molds or ramekins will need to bake in a water bath. Find a baking dish or two able to hold all of your molds. Fill the baking dish(es) with an inch or so of water and put them in the oven to let the water heat up.
The bottoms of the flan molds need to be lined with caramel in its simplest form, melted sugar. When you flip the flans out of the molds, the caramel will drizzle down the sides and onto the plate, as shown above. To make the caramel, put the sugar in a heavy-bottomed saucepan on medium heat and stir until it's all melted and light amber in color.
This step requires you to move quickly. The goal is to coat the bottom of each mold with caramel. The challenge is that as soon as the caramel hits the molds, it hardens. So, you'll need to pour enough caramel to coat the bottom of a mold and then swirl the caramel around the mold almost in the same motion. The original recipe only called for 1/3 cup of sugar, but my recipe calls for double that. If you aren't able to swirl fast enough to coat the the whole bottom, you've got enough extra caramel to do a second spoonful. This whole thing doesn't have to be perfect, just get most of the bottom of each mold covered.
Now comes the easy part. Mix all of the remaining ingredients in a blender until well combined.
Divide the mixture between the caramel-lined molds.
Carefully place the molds into the preheated water-filled baking pans.
Bake for forty minutes or until a toothpick inserted into one comes out clean. Tip: If your oven doesn't heat evenly, be sure to carefully rotate the pans midway through baking.
Remove from oven and bring to room temperature.
Remove molds from water bath, dry off the bottoms, and refrigerate at least six hours or overnight.
When ready to serve, you'll need to unmold the flan. Set the molds in a pan filled with hot water such that the hot water just touches the bottom of the molds and doesn't run up the sides. The goal here is to melt the caramel just enough to easily remove the flans. Let the molds sit for about three minutes.
Carefully flip each flan over onto a plate. If a flan doesn't come out (very likely), carefully cut around the edge of the flan and try again.