Creating the Orange Dreamsicle Cake can be easily accomplished by following these simple steps:

1. Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, baking soda, 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, mixing well after each addition.
5. Incorporate Vanilla and Orange: Stir in the vanilla extract, orange zest, and fresh orange juice until fully combined.
6. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, alternating with the milk. Mix until just combined.
7. Divide Batter: Pour the batter evenly into the prepared cake pans.
8. Bake: Place in the preheated oven and bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
9. Cool: Remove from the oven and allow the cakes to cool in their pans for 15 minutes. Then, gently transfer them to wire racks to cool completely.
10. Prepare Frosting: In a mixing bowl, beat the heavy cream until soft peaks form. Gradually add powdered sugar and orange zest, beating until stiff peaks form.
11. Assemble the Cake: Place one layer of cake on a serving platter. Spread a layer of frosting on top. Add the second layer and frost the top and sides.
12. Garnish: Decorate with fresh orange slices for an elegant finish.

These steps will guide you in creating this incredible Orange Dreamsicle Cake effortlessly.