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1
Lightly grease a 9 by 9-inch square pan.
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2
Line the pan with a piece of parchment paper or aluminum foil, leaving about a 1-inch overhang on all sides.
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3
Combine the condensed milk, evaporated milk, butter, vanilla, and salt in a saucepan and cook over medium heat, stirring continuously with a wooden spoon or heatproof spatula, until the mixture has thickened and starts pulling away from the sides of the pan, 20 to 30 minutes.
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4
When ready, it will slide easily out of the pan when tilted.
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5
Pour into the prepared pan and allow to set, about 2 hours.
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6
Cut into rectangles or desired shapes.
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7
Add 6 tablespoons unsweetened natural cocoa powder (preferably Dutch processed) along with the other ingredients.
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8
Replace the vanilla with 1 teaspoon grated lime zest and add 1 tablespoon freshly squeezed lime juice and a few drops of green food coloring (if desired) once the mixture has been removed from the heat, making sure you add them slowly and stir well so it doesnt separate.
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9
Add 2 teaspoons coffee extract along with the other ingredients.
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10
Replace the evaporated milk with the same size can of coconut milk.
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11
Add 1 tablespoon white or reposado tequila once the mixture has been removed from the heat, making sure you add it slowly and stir well so it doesnt separate.
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12
You can mix and match flavors as you like, and you can do it quite simply.
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13
Pour half of the mixture into the prepared pan, stir another flavorsuch as coffee extract or any kind of flavored oil with a few drops of food coloringinto the other half, then pour that on top.
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14
Alternatively, you can make two separate flavors and make half a batch of each.
