Preheat oven to 350°F (176°C). Line a muffin tin with cupcake liners, or spray with nonstick spray. *Note: I suggest using liners.
In a large bowl cream together the butter and sugar with a hand mixer or stand mixer on a medium speed until fluffy. This should take about 1 minute.
Then add in the nondairy milk, sour cream, egg replacer, and vanilla. Mix again for about 30 to seconds until well incorporated.
Then add in the baking powder, baking soda, and flour. I like to add flour in gradually. Mix on a low speed until just combined. Scrape down the sides with a rubber spatula and mix any remaining flour in. You do not want to overman this batter.
Use a spoon to scoop the batter into the muffin tin wells. *Note: this batter is thicker and not like typical cake batter. You may need to use two spoons to push the batter in.
Bake in the oven for 15 minutes or until a toothpick comes out clean.
Meanwhile, add the strawberries and sugar to a bowl. Mix together with a spoon and set aside.
Using a stand mixer make the frosting. First, beat the vegan butter and vegan cream cheese in the stand mixer on medium speed until fluffy, about a minute. Then add in the vanilla extract and gradually add in powdered sugar. Continue to mix on a medium low speed (about 4 on KitchenAid) until all powdered sugar is added. Finally, add the vegan whipping cream and mix on high speed fo about 3 to 5 minutes until frosting is light and fluffy.
Once frosting is done transfer into a piping bag. I used a Wilton 2A tip on mine. Place in the fridge.
When cupcakes are done let them cool in the tray for 5 minutes. When safe to handle remove and place on a wire rack. Let them cool for at least an hour or until before serving.
Use a small spoon to scoop out the center of the cupcakes. Scoop in a small scoop of the strawberries, enough to fill the center. Push the cupcake top back on. Repeat with all cupcakes. The strawberries may have also made a juice and be sure to use that inside as well, it is delicious!
Once all the cupcakes are filled, add your frosting to the tops.
Garnish with a strawberry half, if desired and enjoy.