Preheat oven to 375 degrees and line a baking sheet with parchment paper or silpat liner.: The kitchen will begin to smell faintly warm as the oven comes up to temperature, and properly preheating ensures the cookies bake evenly and develop light color. A lined sheet prevents sticking and promotes even browning at the bottom, which you will notice as the edges turn a soft golden tone. One common mistake is not preheating fully, which causes cookies to spread too much and lose their tender lift, so wait until the oven registers the full temperature before baking.
Combine strawberries, lemon juice, and 2 tablespoons sugar. Whisk together flour, baking powder, salt, and remaining sugar in a large bowl. Cut in the butter with a pastry blender until mixture resembles coarse crumbs. Stir in cream until dough starts to come together, then stir in strawberry mixture.: When you toss the diced strawberries with the lemon juice and a small portion of the sugar , they will begin to release fragrant juices and a delicate syrup will form, which smells bright and sweet. This maceration concentrates flavor and softens the fruit slightly, creating juicy pockets instead of raw chunks. If you skip this step, the fruit can be less flavorful and more likely to release excess liquid during baking, so be sure to let them sit briefly.
Using a 1-1/2-inch cookie scoop, drop dough onto prepared baking sheets. Sprinkle with sanding sugar and bake until golden brown, about 25 minutes. Transfer to a wire rack, and let cool. Cookies are best served immediately, but can be stored in an airtight container at room temperature for up to 1 day.: As you whisk, the dry mix will take on a uniform, pale appearance and a faint scent of starch. This ensures that the baking powder is evenly distributed for consistent lift. A common issue is uneven mixing, which causes some cookies to rise more than others, so whisk until everything looks homogeneous and breathe in the neutral, slightly wheaty aroma.
Cut in the butter with a pastry blender until mixture resembles coarse crumbs.: Working cold cubes of butter into the flour should create small pea sized lumps and a coarse texture that catches the light. You will feel the difference as the mixture loosens and looks slightly sandy. This texture is important because those butter pockets melt in the oven and make the crumb tender and layered. Avoid overworking the butter into a paste, which yields dense, greasy cookies.
Stir in cream until dough starts to come together, then stir in strawberry mixture.: Adding the heavy cream will form a soft, tacky dough that barely holds when pressed. The aroma will shift to a creamier note, and when you fold in the macerated strawberries , you will see bursts of pink and small streaks of juice. Work gently so you keep some texture and prevent excessive bleeding of color. If the dough becomes overly wet, chilling for a few minutes is better than adding flour, which can make the cookies tough.
Using a 1 1/2 inch cookie scoop, drop dough onto prepared baking sheets.: As you portion the dough with a scoop, you will notice the dough is slightly sticky yet holds shape, and each mound sits with a soft peak. The uniform size ensures consistent baking, and placing them evenly spaced allows hot air to circulate so the tops color evenly. A frequent oversight is crowding the pan, which results in merged cookies and uneven browning, so leave adequate space between mounds.
Sprinkle with sanding sugar and bake until golden brown, about 25 minutes.: Once in the oven, the kitchen aroma will shift to warm, toasty notes as the sugar caramelizes and the edges take on a pale golden hue. The tops will look set and slightly cracked when they are ready. Bake time is approximate, so start checking near the end; underbaked centers can be too soft, while overbaked cookies will be dry and crumbly, so watch for even gentle coloring.
Transfer to a wire rack, and let cool.: Moving the cookies to a wire rack allows air to circulate and prevents sogginess on the bottom, and you will notice steam dissipating as they cool. The aroma becomes more fragrant and the texture firms slightly to a tender, crumbly bite. A common mistake is leaving them on the hot sheet, which continues cooking and can produce overly dry results, so transfer promptly.
Cookies are best served immediately, but can be stored in an airtight container at room temperature for up to 1 day.: Freshly baked, these cookies are at their peak: the crumb is tender, the strawberries are still bright, and the sanding sugar glitters. If you store them, the cookies will soften as the fruit moisture redistributes, and you may lose a bit of crispness on the exterior. To minimize this, place a sheet of parchment between layers and consume within the day; beyond that, texture changes become more pronounced.