In a medium bowl, whisk the flour, baking powder, and baking soda together. Set aside for now.
2½ cups all-purpose flour, 1 teaspoon baking powder, 1 teaspoon baking soda
In a large bowl, using a hand mixer, beat the butter, granulated sugar, and strawberry Jell-O mix together until well combined, about 1 minute.
1 cup salted butter, 1¼ cup granulated sugar, 2 tablespoons strawberry Jell-O mix
Add the instant pudding mix, eggs, and vanilla to the butter mixture. Beat until well combined, about 30 seconds.
3.4 ounces instant vanilla pudding mix, 2 large eggs, 1 teaspoon pure vanilla extract
Beat in dry ingredients. Beat on low just until combined.
Stir in 1¼ cup of the white chocolate chips. Set aside the other ¼ cup of white chocolate chips for now.
1½ cups white chocolate chips
Using a 2-tablespoon-sized cookie scoop, scoop cookies onto a parchment-lined baking sheet. Use your hands to roll the cookie dough scoops into round balls of dough.
Use the remaining ¼ cup of white chocolate chips to press a few chocolate chips on the top of each cookie.
Place the cookies in the freezer for 10 minutes. While the cookies chill, preheat the oven to 350°F.
Line a second baking sheet with parchment paper. Take some of the cookies out of the freezer, and place them 2 inches apart on the baking sheet.
Let the cookies cool on the baking tray for 10 minutes before transferring to a wire rack to cool completely.