This Hostess collaboration cookie brought back childhood nostalgia in the best way! The cookie captures that signature Hostess cream filling flavor—sweet, vanilla-forward, with that almost marshmallow-like softness. Insomnia's chewy cookie base makes it feel more premium than the original snack cake. Limited-edition collabs like this never stick around long. 🍪☁️
1. Brown the butter: In a saucepan over medium heat, melt 1 cup unsalted butter, swirling frequently, until it develops a deep golden color and nutty aroma (5-7 min). Let cool to room temp but not fully solid. Copycat tip: This mimics the rich flavor found in premium Insomnia cookies.
2. Blend wet ingredients: In a mixer bowl, beat browned butter, 3 oz cream cheese, 1.5 cups light brown sugar, and 0.5 cup sugar until fluffy (2-3 min). Add 2 eggs, 2 tsp vanilla extract, and 2 tbsp sour cream; mix until just combined.
3. Mix dry ingredients: In a separate bowl, whisk together 2 cups all-purpose flour, 1.25 cups bread flour, 2 tbsp cornstarch, 1 tsp baking soda, and 0.75 tsp kosher salt.
4. Combine and fold: Gradually mix dry ingredients into the wet mixture until almost incorporated. Fold in 1 cup mini marshmallows for that classic Hostess cloud-like filling effect.
5. Portion and chill: Scoop dough into 9 large balls (about 4 oz each; 3–4 inches wide), spacing well apart. Chill on a tray for at least 1 hour. Chilling is key: It prevents overspreading and creates the signature thick, gooey Insomnia/Crumbl cookie texture.
6. Bake: Preheat oven to 350°F (175°C). Bake chilled cookies 13–15 minutes until edges are golden and centers look just underbaked. Remove and let rest on the pan 10 min. Copycat tip: These will finish setting as they cool, leaving the middles extra soft (like delivery!).
7. Optional: Garnish warm cookies with a swirl of marshmallow fluff and a drizzle of vanilla bean paste for dramatic Hostess cream effect. Serve warm for the ultimate nostalgia hit.