Preheat oven to 350 F. Place 24 paper miniature muffin cup liners in miniature muffin cups; coat with cooking spray.

Prepare brownie mix according to the package directions, using French vanilla yogurt. Spoon batter evenly into prepared muffin cups. Sprinkle evenly with pecans.

Bake at 350 F for 19 minutes. Remove cakes from oven.

Place 3 marshmallows on top of each baby cake; place 1 chocolate kiss in center of marshmallows. Bake an additional 1 minute. Gently swirl melted chocolate kiss to “frost” each cake and hold marshmallows in place.

Cool in pans on wire racks 10 minutes; remove from pans. Cool completely on wire racks.