Preheat your oven to 350 degrees F. This will ensure that your cupcakes bake evenly and rise beautifully.
Line a standard muffin tin with foil liners. Avoid using paper liners, as the milk mixture can soak through them, leading to messy results.
In a medium bowl, combine 1 cup of all-purpose flour, 1 1/2 teaspoons of baking powder, and 1/4 teaspoon of salt. Gently whisk them together to aerate the mixture.
Separate the 5 large eggs. Place the yolks in one bowl and the whites in another. It's crucial to keep them separate for the best texture.
Add 3/4 cup of granulated sugar to the bowl with the egg yolks. Mix on high speed until the yolks become pale yellow and creamy. This process is vital for achieving a fluffy cupcake.
In the same bowl, add 1/3 cup of whole milk and 1 teaspoon of vanilla extract. Stir gently until combined.
Pour the egg yolk mixture over the flour mixture. Carefully stir just until combined, being cautious not to over-mix. Over-mixing can lead to dense cupcakes.
In another bowl, use electric beaters to beat the egg whites on high speed. Gradually add the remaining 1/4 cup of sugar while mixing. Continue until you reach stiff peaks. The egg whites should hold their shape when you lift the beaters.
Gently fold the whipped egg whites into the batter. Use a spatula and fold until just combined; it's okay if there are some visible streaks of white.
Divide the batter among the muffin liners, filling them about three-quarters full. You should be able to make around 22 cupcakes.
Bake in the preheated oven for 12 to 16 minutes, or until a toothpick inserted in the center comes out clean.
Once baked, remove from the oven and allow the cupcakes to cool completely. This step is essential for the soaking process!
Using a long toothpick or thin skewer, prick holes deeply all over each cupcake. Be careful not to poke through the liners.
In a small bowl, combine 12 ounces of evaporated milk, 14 ounces of sweetened condensed milk, and 1/4 cup of whole milk. Whisk until well blended.
Slowly spoon 2 tablespoons of the milk mixture over each cupcake, allowing it to soak in gradually. This is where the magic happens!
Refrigerate the cupcakes for at least 1 hour, or overnight if possible, to let them soak up all that goodness.
Just before serving, whip the heavy cream, 3 tablespoons of powdered sugar, and 1/2 teaspoon of vanilla extract until stiff peaks form. This will make your topping light and fluffy.
Spoon a generous dollop of the whipped cream over the top of each cupcake. Finish with a sprinkle of ground cinnamon and fresh strawberry slices if desired. Enjoy every delicious bite!