Creating Heaven on Earth Cake is straightforward if you follow these steps:

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. Mix Dry Ingredients: In a large bowl, sift together the flour, baking powder, and salt.
3. Cream Butter and Sugar: In another bowl, beat the softened butter and granulated sugar until light and fluffy.
4. Add Eggs: Add the eggs one at a time to the butter-sugar mixture, mixing well after each addition.
5. Combine: Gradually add the dry ingredients to the wet mixture, alternating with the milk. Begin and end with dry ingredients. Stir in the vanilla extract.
6. Divide Batter: Pour the batter evenly into the prepared cake pans.
7. Bake: Place the pans in the preheated oven and bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
8. Cool the Cakes: Once baked, remove from the oven and let the cakes cool in the pans for about 10 minutes. Invert onto wire racks to cool completely.
9. Prepare the Whipped Cream: In a mixing bowl, whip the heavy cream with the powdered sugar until soft peaks form.
10. Assemble the Cake: After the cakes are cool, place one layer on a serving platter. Spread a generous amount of whipped cream over it and top with half of the mixed berries. Place the second layer on top and repeat the frosting process. Decorate the top with remaining berries.
11. Chill: If time allows, chill the assembled cake in the refrigerator for about 30 minutes before serving.

Each step will guide you towards achieving the cloud-like, wonderful Heaven on Earth Cake you’re aiming for!