Creating Berry Shortcakes in a Jar is simple when you follow these easy steps:

1. Prepare the Shortcake: In a large bowl, combine flour, sugar, baking powder, and salt.
2. Cut in Butter: Add the chilled, cubed butter to the dry ingredients. Use a pastry cutter or your fingers to mix until the mixture resembles coarse crumbs.
3. Mix Wet Ingredients: In a separate bowl, combine milk and vanilla extract. Gradually pour the wet mixture into the dry mixture, stirring until just combined.
4. Form Shortcakes: Turn the dough onto a floured surface and gently knead it just until it comes together. Pat into a 1-inch thick rectangle.
5. Cut Shortcakes: Use a biscuit cutter or a glass to cut out shortcake rounds. Place them on a baking sheet lined with parchment paper.
6. Bake: Preheat your oven to 425°F (220°C). Bake the shortcakes for 12-15 minutes or until golden brown. Let them cool completely.
7. Whip the Cream: In a mixing bowl, beat the heavy whipping cream with powdered sugar until soft peaks form.
8. Prepare the Berries: Wash and slice the berries as needed. If using strawberries, hull and slice them into quarters.
9. Layer the Jars: Begin layering in clean jars: start with a shortcake layer, followed by a layer of berries, and then a layer of whipped cream. Repeat until jars are filled to the top.
10. Chill (Optional): For best flavor, let the jars chill in the refrigerator for at least 30 minutes before serving.