Begin by preparing the creamy filling for your Strawberry Cheesecake Cookies. In a mixing bowl, combine softened cream cheese with granulated sugar until the mixture is smooth and creamy. Add in sour cream and vanilla extract, mixing well until everything is fully incorporated. Using a spoon or small scoop, place 2-teaspoon dollops of this filling onto a parchment-lined baking sheet and pop it into the freezer for about 30 minutes to firm up.

Next, let’s create the cookie dough. In a large mixing bowl, cream together the softened unsalted butter, firmly packed light brown sugar, and granulated sugar until light and fluffy—this should take about 2-3 minutes. Once combined, add the room temperature eggs and vanilla extract, mixing until you achieve a smooth batter. Be sure to scrape down the sides of the bowl to incorporate all ingredients thoroughly.

In a separate bowl, whisk together the dry ingredients: all-purpose flour, graham cracker crumbs, cornstarch, baking powder, baking soda, and salt. This step is essential for ensuring that your Strawberry Cheesecake Cookies have the right texture. Gradually add the dry mixture to the creamed butter and sugar mixture, mixing until just combined; do not overmix. Once combined, cover the dough and chill it in the refrigerator for about 30 minutes.

While your dough is chilling, preheat your oven to 375°F (190°C) and line two baking sheets with parchment paper. If you decide to use white chocolate, take this time to chop it into small bits. This will not only enhance the flavor of your cookies but also add a delightful texture when they bake.

Now it’s time to assemble your Strawberry Cheesecake Cookies! Scoop generous portions of the chilled cookie dough and create a small crater in the center of each scoop. Spoon in your favorite strawberry jam (or any other jam you prefer), followed by placing a frozen dollop of cream cheese filling on top. Carefully enclose the filling with the dough, rolling it into a ball. If you're using white chocolate, gently press the chopped bits into the tops of each ball.

Place the assembled cookies on the prepared baking sheets, ensuring they are spaced a few inches apart. Bake in the preheated oven for about 14-15 minutes, or until the edges are lightly golden and the centers are still soft. Watch them closely, as you want to avoid overbaking, which might lose that delicious gooey center.

Once baked, let your Strawberry Cheesecake Cookies cool completely on the baking sheet for about 10 minutes. This step is crucial as it allows the cookies to set properly. After cooling, transfer them to a wire rack to cool down completely. Enjoy the heavenly taste of your homemade cookies, and relish the delightful flavors and textures that make each bite a special treat!