These Vibrant Rainbow Jello Cookies by Sophie are soft, chewy, and bursting with fruity flavor and color! Each cookie is infused with Jell-O powder for a nostalgic, old-fashioned treat that’s as beautiful as it is delicious — perfect for parties, holidays, and family fun.
1 cup (226 g) salted butter, softened
1 ¼ cups (250 g) granulated sugar, plus extra for rolling
2 large eggs, room temperature
3 cups (360 g) all-purpose flour
1 teaspoon baking soda
½ teaspoon salt
1 (6 oz / 170 g) box flavored gelatin powder (or 6 small 3 oz boxes for rainbow colors)
Optional: extra gelatin powder in assorted flavors for coloring separate dough portions
**Preheat Oven**
Set oven to 350°F (175°C) and line baking sheets with parchment paper or silicone mats.
**Cream Butter & Sugar**
Beat softened butter and sugar together for 2–3 minutes until light, pale, and fluffy.
**Add Eggs**
Mix in eggs one at a time until fully combined. Scrape down the bowl.
**Combine Dry Ingredients**
In another bowl, whisk together flour, baking soda, and salt.
**Mix Dough**
Gradually add dry mixture to wet ingredients. Mix on low speed just until combined — do not overmix.
**Add Gelatin Flavor**
For one flavor: add one 6 oz box of gelatin and mix until evenly colored.
For rainbow cookies: divide dough into 6 portions and mix 2 tbsp of different gelatin flavors into each.
**Shape & Coat**
Roll dough into 1½ tbsp balls, coat in extra sugar, and arrange 2 inches apart on baking sheets.
**Bake**
Bake for 10–12 minutes, until edges are set and centers are slightly puffy and soft.
**Cool**
Let cookies rest on the pan 5 minutes, then transfer to a wire rack to cool completely.
🎨 **Cookie Tips**
• Butter should be soft but cool — too warm and cookies will spread.
• Use classic Jell-O brand gelatin for the best color and flavor.
• Slightly underbake for a chewy texture; cookies firm as they cool.
• For vibrant rainbow cookies, try cherry, orange, lemon, lime, blue raspberry, and grape.
• Store in airtight containers up to 5 days or freeze for 2 months.
Find it online: https://pinchofwarmthbakes.com/vibrant-rainbow-jello-cookies/