Preheat oven to 400F. Lightly butter six (8 oz) ramekins and place on a large baking sheet. Set aside.
In a large bowl, combine rhubarb, peaches, lemon juice, cornstarch, and honey. Divide fruit filling between ramekins and bake at 400F 15-20 minutes until filling is bubbly and softened. Remove from oven and set aside.
Cobbler Topping
In a large bowl, combine flour, baking powder, salt, and sugar. Cut in butter with fingers or a pastry cutter until crumbly. Fold in vanilla, yogurt, heavy cream, and milk until dough is just moistened.
Scoop batter by the tablespoon and divide between ramekins on top of fruit filling. Sprinkle each ramekin with additional sugar if desired.
Bake cobblers at 400F an additional 15-20 minutes until cobbler topping is golden brown and fruit filling is bubbly.
Cool cobblers several minutes then enjoy warm with vanilla ice cream or whipped cream. Enjoy!