In a medium bowl, whisk flour, sugar, baking powder, and salt. Set aside.
In another bowl, whisk the butter, egg, milk, and vanilla paste.
Stir wet ingredients into dry until just combined. The batter should be lumpy. Fold in the strawberries.
Heat a griddle, or large frying pan, over medium-high heat until hot. Spray griddle with cooking spray. Pour batter by 1/4 cup scoops. I use a large ice cream scoop. Work in batches grilling a few pancakes at a time. Cook until bubbles burst. Turn and cook until underside is golden.
Remove from pan and repeat with the remaining batter, spraying griddle with more cooking spray as needed.
Stack pancakes on a warm plate. Serve immediately.