Dice strawberries
Set aside ½ cup diced
Mash the rest
Let mashed strawberries drain 10–15 minutes
Lightly press out excess liquid
You want thick, pulpy strawberries — not watery
Preheat oven to 350°F
Line or grease a 9×9 pan
In a medium mixing bowl, whisk together flour, sugar, baking powder, baking soda, salt
In a large mixing bowl, whisk mashed strawberries + jam
Add sour cream, oil, eggs, vanilla and continue whisking until fully combined and smooth
Fold wet into dry until just combined
Fold in diced strawberries
Batter should be thick (like soft cake batter, not runny)
Spread evenly into a 9X9 inch pan
Bake 32–40 minutes
Cool completely before frosting.
Chocolate Frosting
In the bowl of a stand mixer, beat butter until smooth and creamy
Add cocoa powder and vanilla until fully mixed, and slowly add powdered sugar
Add milk for softer, spreadable frosting
Add powdered sugar for thicker
You want it fluffy but easy to spread, not stiff