
Preheat the oven to 325℉. Grease and flour 2 8"-round cake pans. Set aside.
In the large bowl of a standing electric mixer, whisk together all of the cake ingredients except for the premade cake mix.
Using a fine sieve, sift the premade cake mix into another bowl. Then turn on the mixer on low and slowly add the sifted cake mix into the the other cake ingredients.
Pour the batter evenly into the two cake pans. Bake for 22-24 minutes and then allow to cool completely on a cooling rack. Take the cakes out of the pan and, once completely cool, wrap them in plastic wrap and place in the freezer until ready to use.
In the bowl of the stand mixer, whip the butter until it's fluffy. Add in the salt, vanilla, strawberry emulsion, strawberry powder, and heavy cream. Mix on low until it's all combined. Then slowly mix in the confectioner's sugar--about 1/4 cup at a time, intermixing it with the heavy cream. Add more cream or sugar until you get the desired consistency. For a few moments turn the mixer on high to get a fluffier frosting.
On a cake plate, stack and frost the cake rounds. If you're feeling adventurous, use a frosting bag and piping tip to declare the cake. Once it's frosted, refrigerate for 10 minutes to set the frosting. Then decorate with your favorite flowers, candies, or chocolate covered strawberries.