Preheat your oven to 350 degrees and grease a 9x13 inch baking dish with butter or nonstick cooking spray.
Combine your butter and sugar in a large mixing bowl. Use an electric hand mixer to cream the ingredients together until smooth.
Once the butter and sugar are smooth, add the eggs and milk. Mix again until the eggs and milk are blended with the creamed sugar.
Gently whisk in the Jello powder, flour, baking powder, and baking soda. Mix until no pockets of flour or other dry ingredients remain in the cake batter.
Pour the cake batter into the prepared pan and use a spatula to smooth out the top.
Bake your cake for 45 minutes, or until a toothpick can be cleanly removed from the center of the pan.
Remove the cake from the oven and allow it to cool on the counter for 45 minutes.
Once the cake has cooled, prepare the frosting by using a hand mixer to whisk the cream cheese, powdered sugar, and diced strawberries together on medium-high speed. Mix until smooth.
Use a spatula to spread the frosting over the cake evenly.
Slice, serve and enjoy!