Preheat oven to 350 degrees. Stir the melted butter and sugars together in a large mixing bowl.
Add the lemon juice, vanilla extract, and egg, and mix until well combined.
Mix the flour, baking soda, and salt in a separate bowl. Slowly add the dry ingredients to the wet ingredients until just combined.
Fold in the white chocolate chips.
Fold in the chopped raspberries, being careful not to overmix.
Scoop the dough out using a standard cookie scoop, and drop the cookies on a prepared baking sheet at least 2 inches apart. Bake in the preheated oven for 14-15 minutes, until just beginning to brown on the bottoms.
Notes
Use fresh, firm raspberries for the best results! Mushy raspberries will work fine but may bleed the red color through the cookies.Be careful not to overmix the raspberries, it will make the batter pink.Because the fresh raspberries are so moist, these cookies only last 1-2 days in an airtight container before becoming very soft. Store in an airtight container at room temperature for only a day or two, or freeze in an airtight container for up to a month.Use freeze-dried raspberries if you need to make these more than a day ahead of time.Frozen raspberries will not work in this recipe, even when thawed. I found they turned the batter pink, and that it ended up turning a blueish color after baking.White chocolate chips are optional but add a lot of texture and flavor!