These are a must-bake for kids. Why? Because they are colorful and super sweet. I know, I know, kids shouldn’t have a ton of sugar — but I’m a firm believer in the “everything in moderation” mantra. I was at my parents’ house the weekend I made these. My mom hated them (too sweet!) and my dad loved them, so it really is a matter of personal preference. You can use any Jello flavors you’d like – I chose strawberry, orange, lemon, and lime.
Recipe source: iheartnaptime.net 
3-1/2 cups flour
1 teaspoon baking powder
1-1/2 cups salted butter, softened
1 cup sugar
1 teaspoon vanilla
4 (3-oz) packages of Jello, any flavors you’d like
1. Preheat oven to 350F.
2. Beat butter in large bowl with mixer until creamy. Add sugar and beat until light and fluffy. Blend in the egg and vanilla. Mix flour and baking powder in a separate bowl. Gradually beat in flour mixture.
3. Divide dough into 4 sections. Sprinkle 2 Tablespoons of Jello onto each section. Knead together with dough. *You might want to add a little food coloring to make the colors even more vibrant.
4. Shape dough into 1-inch balls. Roll in the etra Jello from the packets. Place, 2 inches apart, on parchment-lined baking sheets. Flatten with bottom of bowl.
5. Bake 8-10 minutes. Cool on baking sheets for 2 minutes, then remove to wire racks to cool completely.
Makes approximately 2 dozen cookies.