Preheat the oven to 400.
Chop 3 strawberries into little chunks and set aside.
In a medium mixing bowl mix together flour, baking powder, baking soda, salt, and sugar until its completely incorporated.
With a pastry cutter or fork cut in cold butter until the butter resembles peas in size. Don't take a long time to do this, you want the butter to stay cold.
With a wooden spoon mix in milk, and vanilla.
Fold in the chopped strawberries.
Turn the dough onto a floured surface and press the dough into a rectangle shape. Fold each side of the dough toward the middle then flip the dough and press out until its about an inch or inch and half thick.
With a round cookie cutter or glass (I used a glass about 2 1/2 inches wide) cut out circles and place them on a cookie sheet. I made 12, but depending on the size you cut it could be different.
Using about a tablespoon of sugar sprinkle a little on top of each biscuit before baking.
Bake them at 400 for 15-17 minutes. or until lightly brown on the bottoms.