Divide frosting into 3 small re-sealable bags. Tint one red for "ketchup," one yellow for "mustard," and the last one is for "mayonnaise." Snip one corner of each bag with scissors for piping frosting.
Place coconut and 2-3 drops of green food coloring into a small re-sealable bag. Shake until the "lettuce" coconut is uniformly colored.
To assemble "hamburgers," pipe a dot of white frosting on the flat side of a vanilla wafer. Place a "hamburger" peppermint patty on top of the dot. Pipe another white dot on top of the peppermint patty. Top with tinted coconut. Drizzle red and yellow frosting over the coconut and top with another vanilla wafer. Brush top of “hamburgers” with honey and sprinkle with sesame seeds. Repeat until you've made desired amount of cookies.