Step 1: Preparing the Cake Layers

1. Preheat oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan.

2. In a large bowl, cream together the softened butter and granulated sugar until light and fluffy (about 3-5 minutes).

3. Add the eggs one at a time, mixing well after each addition.

4. Stir in the vanilla extract.

5. In a separate bowl, whisk together the all-purpose flour, baking powder, and salt.

6. Gradually add the dry ingredients to the butter mixture, alternating with the milk, beginning and ending with the flour mixture. Mix until just combined.

7. Pour the batter into the prepared baking pan and smooth the top.

8. Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.

9. Let the cake cool completely before assembling.

Step 2: Making the Cream Filling

1. In a large mixing bowl, pour in the heavy whipping cream.

2. Add the powdered sugar and vanilla extract.

3. Using an electric mixer, whip the cream on medium speed until stiff peaks form (about 3-5 minutes). Be careful not to over-whip.

4. Refrigerate until ready to use.

Step 3: Assembling the Cake

1. Once the cake has cooled, carefully cut it in half horizontally to create two layers.

2. Place the bottom layer on a serving platter and spread half of the whipped cream evenly over it.

3. Gently place the top layer back on and spread the remaining whipped cream over the top.

4. Dust the cake with powdered sugar for a classic finish.

Step 4: Chilling and Serving

1. Cover the cake with plastic wrap or a cake dome and refrigerate for at least 1 hour to allow the flavors to meld.

2. Slice and serve chilled for the best texture and taste.