Step 1: Prepare the Oven and Baking Pans

1. Preheat your oven to 350°F (175°C).
2. Grease and flour two 9-inch round cake pans, or line them with parchment paper to prevent sticking.

Step 2: Mix the Dry Ingredients

1. In a medium bowl, sift together:
   • 2 ½ cups all-purpose flour
   • 2 ½ teaspoons baking powder
   • ½ teaspoon salt
2. Set the bowl aside for later.

Step 3: Cream Butter and Sugar

1. In a large mixing bowl, use an electric mixer to beat 1 cup of unsalted butter and 2 cups of sugar on medium speed for 3-5 minutes, until the mixture is light, fluffy, and pale in color.
   • Proper creaming ensures a tender and airy cake.

Step 4: Add Eggs and Vanilla

1. Beat in 4 large eggs, one at a time, ensuring each is fully incorporated before adding the next.
2. Mix in 1 ½ teaspoons of pure vanilla extract for flavor.

Step 5: Combine Wet and Dry Ingredients

1. Reduce the mixer speed to low.
2. Gradually add the sifted dry ingredients to the butter mixture in three parts, alternating with 1 cup of milk in two parts.
   • Start and end with the dry ingredients.
3. Mix gently after each addition, being careful not to overmix. Overmixing can result in a dense cake.

Step 6: Pour and Smooth Batter

1. Divide the batter evenly between the prepared pans.
2. Smooth the tops with a spatula for an even rise.

Step 7: Bake

1. Place the pans in the preheated oven and bake for 30-35 minutes.
2. Check for doneness by inserting a toothpick into the center of the cakes. If it comes out clean, they’re ready.

Step 8: Cool the Cakes

1. Remove the pans from the oven and let the cakes cool in the pans for 10 minutes.
2. Gently transfer the cakes to a wire rack and cool completely before frosting or serving.

Step 9: Frost and Serve

1. Frost with your choice of buttercream, cream cheese frosting, or glaze.
2. Serve plain or with a dusting of powdered sugar for a simple yet elegant presentation.