Step 1: Preheat the Oven

• Preheat your oven to 350°F (175°C) and grease a 9-inch round cake pan or line it with parchment paper.

Step 2: Mix the Wet Ingredients

• In a large mixing bowl, cream together the softened butter and sweetened condensed milk until smooth and well combined. Add the eggs and vanilla extract, mixing until fully incorporated.

Step 3: Combine the Dry Ingredients

• In a separate bowl, whisk together the flour, baking powder, and salt.

Step 4: Combine the Mixtures

• Gradually add the dry ingredients to the wet mixture, stirring until just combined. Be careful not to overmix, as this can lead to a dense cake.

Step 5: Bake the Cake

• Pour the batter into the prepared cake pan and spread it evenly. Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean.

Step 6: Cool the Cake

• Once baked, remove the cake from the oven and let it cool in the pan for 10 minutes. Then, transfer it to a wire rack to cool completely.