Creating the Blueberry Heaven on Earth Cake is straightforward when following these simple 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 all-purpose flour, baking powder, baking soda, and salt. Set aside.
3. Cream Butter and Sugar: In another bowl, cream the softened butter and granulated sugar until light and fluffy.
4. Add Eggs and Vanilla: Incorporate the eggs one at a time into the butter and sugar mixture. Mix in the vanilla extract.
5. Combine with Milk: Gradually add the dry ingredients to the butter mixture, alternating with the milk, and mix until just combined.
6. Fold in Blueberries: Gently fold in 1 ½ cups of fresh blueberries, being careful not to crush them.
7. Prepare the Batter: Divide the batter evenly between the two prepared cake pans. Spread it smoothly.
8. Bake: Place the pans in the preheated oven and bake for 35-40 minutes or until a toothpick inserted in the center comes out clean.
9. Cool the Cakes: Once baked, remove the cakes from the oven and allow them to cool in their pans for about 20-25 minutes. Then, transfer them to a wire rack to cool completely.
10. Prepare Frosting (Optional): While cakes are cooling, you may prepare your preferred frosting recipe if desired.
11. Assemble the Cake: Once completely cooled, place one cake layer on a serving platter, top it with frosting and the remaining ½ cup of blueberries, then place the second cake layer on top.

These steps will guide you in creating this incredible cake effortlessly.