Beat sugar and eggs in a large mixing bowl until creamy.
Combine flour and baking soda; add to sugar mixture alternately with milk.
Add melted butter and vanilla and beat thoroughly.
Line muffin tins with cupcake liners.
Fill cups about 2/3 full and bake at 375 degrees for 20-25 minutes or until light golden brown.
Cool on a wire rack.
Dip cooled muffin tops into white chocolate to coat.
Dip into Fruity Pebbles to coat.