In a large mixing bowl, add the flour, baking powder, baking soda, salt, and sugar. Mix all of the ingredients together.
Then add in the butter and use a pastry cutter to chop it up until it resembles pea-sized crumbs.
Next, add in the beaten egg, lemon juice, and milk. Mix together until all ingredients are well incorporated and the dough forms into a ball. The dough will be a little sticky.
Then lightly flour a flat surface and place the dough on it. Use your hands to shape the dough into a 7'' x 7'' round with about 1 ¼'' height. Cut out scones with a round cookie / biscuit cutter. (I used a 2 ½'' cutter) Then place the scones on a plate lined with parchment paper and cover with plastic wrap. Freeze the scones for 15 minutes.
While the dough is in the freezer, preheat the oven to 400°F. Remove the scones from the freezer and place them on a baking sheet lined with parchment paper or a silicone mat. (Ensure the baking sheet can withstand the high temperature)
Bake the scones for 26-28 minutes or until they turn a light golden brown color. Let the scones cool for 5 minutes before moving them with a spatula to a cooling rack.
Once the scones are cool, you can cut the scones in half and layer them with strawberries and whipped cream.