|1 1/2 t. agar agar||1 t. pure vanilla extract|
|1 1/2 C sugar||vegetable-oil cooking spray|
|2/3 C light corn syrup|
|1/8 t. salt||corn starch|
Place 1/3 C cold water into bowl of electric mixer. Sprinkle with agar agar. Let mixture soften for 5 minutes.
Place sugar, corn syrup, salt and 1/3 C water in small to medium saucepan (if you use to large of a saucepan, the themometer will not be covered by mixture). Cover. Bring to a boil. Remove lid. Cook, swirling occasionally until syrup reaches 238 degrees (soft ball stage) (~5 minutes).
With mixer on low speed, whisk agar agar mixture while slowly adding syrup in a steady stream down the side of the bowl. Gradually increase mixer to high. Beat until mixture is thick, white and has almost tripled in volume (~ 12 minutes). Add vanilla (or other flavoring/food coloring) and beat 30 seconds more.
Pour mixture into baking sheet and smooth with spatula sprayed with cooking oil. Let sit (uncovered) overnight.
Cut out with cookie cutters or cut with kitchen scissors, sprayed with cooking oil. Roll marshmallows in corn starch to keep them from sticking to each other. Store in air tight container, with wax paper between layers.