Preheat oven to 350º Fahrenheit and prepare baking pans with parchment paper or silicon liners.: The kitchen will warm with a dry, toasty heat almost immediately, and you may notice a faint scent as the oven comes up to temperature. Preheating ensures even baking and predictable spread of the cookies, because cold ovens cause underbaking inside and overbrowning outside. Place racks in the center third of the oven so heat circulates evenly. A common mistake is placing pans too close together which blocks airflow, so give each pan room and rotate if your oven has hot spots.
Whisk together dry ingredients of flour, baking soda, and salt.: As you whisk the all-purpose flour , baking soda , and kosher salt , you are aerating the mixture and blending leavening evenly. The dry mix should look uniform, with no pale streaks of flour or clumps of baking soda. This step prevents pockets of salt or soda in finished cookies which can taste sharp. If you skip this, expect uneven rise or salty bites.
Cream together butter, Crisco, and brown sugar until light and fluffy, about 3 minutes.: The bowl will go from grainy to pale and airy, and you should hear a quieter, creamy sound from the mixer as the butter and Crisco emulsify with the light-brown sugar . This aeration creates lift and soft texture. Scrape the bowl a couple of times to keep everything evenly mixed; undercreamed fat yields denser cookies.
Add in egg and vanilla and beat until well-combined.: When you add the egg and vanilla extract , the mixture will look glossy and more cohesive. The egg helps bind while vanilla layers in aroma. Make sure the egg is at room temperature so it blends smoothly; adding a cold egg can seize the fat and create little curdled bits.
Slowly add in flour mixture until just combined.: As you fold the dry mix in, aim for a dough that holds together without visible streaks of flour. Overmixing here will develop gluten and give a tougher chew, so stop when there are no dry patches. The dough should feel slightly tacky; if it feels overly wet you may have measured flour incorrectly.
Stir in strawberries, nuts, and white chocolate chips.: The dried strawberries , toasted macadamia nuts , and white chocolate chips add color, crunch, and creamy pockets. Stir until evenly distributed so every scoop has a balance of mix ins. If the dried fruit clumps, break it up with your fingers first; otherwise you risk uneven distribution and bites without strawberries.
Scoop approximately 1 1/2 – 2 tablespoons of cookie dough and drop onto prepared baking pan, leaving about 2 inches apart to allow cookies to spread.: When scooping, the surface texture should be smooth with specks of fruit and chocolate visible. Leaving space is crucial because these cookies spread into a wider, slightly domed shape. If you crowd the pan, cookies will merge and bake unevenly; use two pans if needed.
Bake until lightly golden brown, about 12-15 minutes, depending on your oven.: During baking the edges will set first and the centers will puff slightly, with a pale golden hue forming at the bottom and edges. You may smell brown sugar caramelizing, and the white chocolate will become glossy. Pull them near the earlier time if you prefer softer centers. Overbaking yields a drier texture and will mute the strawberry brightness.
Remove and allow to cool.: Once out of the oven, the cookies will continue to set as they cool, so allow them to rest on the pan for a few minutes before transferring to a rack. You will notice the aroma intensify as steam escapes, and the centers will settle to the right chew. Rushing to remove them hot can cause them to break if they are still too soft.
You may omit the macadamia nuts in the case of nut allergies.: If you leave out the macadamia nuts , the texture will shift toward a uniformly soft cookie with fewer crunchy moments. I recommend pressing the dough slightly flatter to ensure an even bake if you omit nuts, because the structure changes. Be careful not to add liquid to compensate, which would make the dough too soft.