Prepare the Cupcakes: Preheat oven to 350°F. In a medium bowl, whisk together the eggs and milk until incorporated. Add the sour cream, oil and Jell-O and whisk until smooth. Add the cake mix and whisk until smooth and no lumps remain.: Preheat oven to 350°F. In a medium bowl, whisk together the eggs and milk until incorporated. Add the sour cream, oil and Jell-O and whisk until smooth. Add the cake mix and whisk until smooth and no lumps remain. : Warmth and steam are the first signals you will notice when you preheat your oven to 350°F , the air taking on that faint sweet scent of baked goods. The batter should feel silky as you whisk the eggs and milk together, with no streaks of white egg visible, and the strawberry Jell-O should dissolve completely into the wet mix, giving the mixture a soft pink hue and a faint strawberry perfume. When you fold in the white cake mix , the batter will thicken and become glossy, indicating the leavening agents are evenly distributed. A common mistake here is undermixing then spotting dry pockets of cake mix, which leads to uneven texture, so whisk until the batter is uniformly smooth. If the batter seems too stiff, a tablespoon of extra milk will bring it to the right pouring consistency without diluting flavor. Remember this wet to dry marriage is what creates a tender crumb, so take your time until the texture is cohesive and lump free.
Spoon the cupcake batter into 2 lined cupcake or muffin pans (or bake in batches if you only have one) filling approximately 2/3 of the way. Bake for about 15-18 minutes or until a toothpick comes out clean. Remove from the oven and allow to cool for about 5 minutes before transferring to a wire cooling rack.: You will see the batter dome slightly and edges pull away from the liners as they bake, emitting a warm, sweet aroma that announces they are nearly done. The surface should be springy to the touch, and a toothpick inserted in the center should come out clean or with a few moist crumbs, never wet batter. Leaving them to cool on the pan for about 5 minutes lets the cupcakes set so they do not deflate when moved, and transferring to a wire rack allows air to circulate, preventing soggy bottoms. A frequent error is overbaking, which dries the crumb and ruins the tender texture, so start checking at the earliest time. If you see large cracks or the tops are very dark, your oven may be too hot, so note that for next time.
Make the Vanilla Buttercream: Using an electric mixer, beat the softened butter until smooth and creamy. Add the vanilla and beat to incorporate. Begin adding the powdered sugar slowly, about 3/4 cup at a time, beating until smooth after each addition. Once the powdered sugar is incorporated, add the milk or cream a tablespoon at a time until desired consistency is reached. Double the frosting recipe to pipe your cupcakes versus spreading the frosting.: Using an electric mixer, beat the softened butter until smooth and creamy. Add the vanilla and beat to incorporate. Begin adding the powdered sugar slowly, about 3/4 cup at a time, beating until smooth after each addition. Once the powdered sugar is incorporated, add the milk or cream a tablespoon at a time until desired consistency is reached. Double the frosting recipe to pipe your cupcakes versus spreading the frosting. : As you beat the softened butter , it will lighten in color and develop a cloud like texture, releasing a rich, buttery scent. Adding the vanilla brings warmth and depth, and the powdered sugar will initially look powdery before it melts into a smooth, satiny frosting under the mixer’s blades. When you add milk or heavy cream a tablespoon at a time, the frosting will shift from a thick paste to a glossy spreadable or pipeable consistency, and you will hear the mixer change pitch slightly as the aeration increases. If the buttercream feels greasy or too soft, chilling it briefly will firm it up; conversely, if it is too stiff, a touch more cream will loosen it. Avoid adding all the liquid at once, because then you may overshoot the ideal texture and end up with runny frosting that will not hold peaks.
Make the strawberry crunch topping: Combine the freeze dried strawberries and Golden Oreos in a food processor. Process until broken down into crumbs. Add in the butter and pulse several times to incorporate into the mixture.: Combine the freeze dried strawberries and Golden Oreos in a food processor. Process until broken down into crumbs. Add in the butter and pulse several times to incorporate into the mixture. : The aroma will shift to bright strawberry and cookie as the freeze dried strawberries and Golden Oreos break down, releasing a crisp, toasted note from the cookies and concentrated berry scent from the dried fruit. The texture you want is a mix of fine crumbs and slightly larger clusters so the topping has both dust like coverage and satisfying crunch. Adding the melted butter binds the crumbs into small clumps that cling to the frosting rather than sliding off. A common trap is overprocessing until the mixture becomes pasty, which loses the desired crunch, so pulse in short bursts and check often to preserve texture.
Frost the cupcakes: Once the cupcakes have cooled completely, frost them as desired and sprinkle a generous amount of the strawberry crunch over top of the frosting. Enjoy immediately or store them in an air tight container at room temperature for up to 2 days, or refrigerated for 4-5 days.: Once the cupcakes have cooled completely, frost them as desired and sprinkle a generous amount of the strawberry crunch over top of the frosting. Enjoy immediately or store them in an air tight container at room temperature for up to 2 days, or refrigerated for 4-5 days. : When the cupcakes are fully cool, the buttercream will spread smoothly without melting, and each frosted swirl will hold shape with a soft sheen. Sprinkle the crunch while the frosting is fresh so the crumbs adhere, and you will notice contrast between the creamy frosting and crisp topping the moment you bite in. If you frost warm cupcakes, the frosting can slide and the crunch will become damp, so patience here pays off. For storage, room temperature keeps the crumb tender, while refrigeration extends shelf life though it may slightly firm the frosting; allow chilled cupcakes to come to room temperature for about ten minutes before serving for the best texture.
