Start by mixing flour, sugars, baking powder, oil, and vanilla until crumbs form. Spread them on a baking tray and bake until golden. Let them cool completely before using.
Dice fresh strawberries into small pieces so they distribute evenly. Toss them with lemon juice to enhance flavor and maintain their bright color. Set aside while preparing the dough.
In a large bowl, beat butter with brown and white sugar until light and fluffy. This step creates a soft and airy cookie base. Take your time here for best results.
Mix in the egg, extra egg yolk, and vanilla extract until just combined. The extra yolk adds richness and helps create that chewy center. Avoid overmixing at this stage.
Add flour, baking soda, baking powder, and salt into the mixture. Mix gently until almost combined, leaving a few flour streaks. This keeps the cookies tender.
Carefully fold in diced strawberries and shortcake crumbs. Try not to crush the strawberries too much to avoid excess moisture. This step gives the cookies their signature flavor.
Scoop the dough onto a lined baking tray and top with extra crumbs. Chill the dough in the freezer for at least 2–3 hours. This step prevents spreading and enhances texture
Bake in a preheated oven at 350°F (180°C) until edges turn lightly golden. Let them cool on the tray for 15 minutes before transferring. They will continue cooking slightly after baking.