Chocoflan (AKA Pastel Imposible or Impossible Cake) - Rick Bayless

Ingredients

• a few tablespoons softened butter
• 1 cup cajeta (store-bought or homemade)
• 1 1/3 cup (190 g) all-purpose flour
• 1 cup sugar (200 g)
• 1/2 cup (40 g) cocoa powder (one of the dark/black cocoa powders shines here)
• 1/2 teaspoon salt
• 3/4 teaspoon baking powder
• 3/4 teaspoon baking soda
• 1 cup milk (or ½ cup milk and ½ cup coffee)
• 1 egg
• 1/2 cup oil
• 1 12 -ounce can sweetened condensed milk (La Lechera brand is very popular in Mexico)
• 1 14 -ounce can evaporated milk
• 1 teaspoon vanilla
• 4 eggs