Step #1 preheat your trusty oven to 350-degrees F.
Step #2 Grease a 13x9x2-inch baking pan.
Step #3 In a medium, microwave-safe bowl, mix butter & chocolate.
Step #4 Place in microwave for 1 min on high.
Step #5 Remove & stir thoroughly.
Step #6 If chocolate is not melted, return to microwave for another 30 seconds.
Step #7 Repeat until chocolate is melted.
Step #8 This should not take more than 2 mins.
Step #9 stir in the sugar & mix completely.
Step #10 Add eggs & vanilla.
Step #11 Stir until just mixed - don't overbeat.
Step #12 stir in the flour.
Step #13 Pour batter into prepared pan & bake for 30 to 35 mins,or until wooden toothpick inserted in center comes out clean.
Step #14 Cool.
Step #15 Place marshmallows & milk in a microwave-safe bowl.
Step #16 Cook on high for 2 mins.
Step #17 remove this from microwave & stir.
Step #18 If necessary to melt marshmallows, return to microwave for another 30 seconds to 1 min (depending on the wattage of your microwave).
Step #19 Stir until smooth.
Step #20 Add peppermint extract & green food coloring to marshmallows (use more or less coloring to suit your own taste), & stir this to distribute evenly.
Step #21 Chill until slightly thickened.
Step #22 Fold in whipped cream, then pour entire mixture over the brownies.
Step #23 Freeze.
Step #24 Remove Brownie Tortoni from freezer, & place this in refrigerator about 30 mins before serving.
Step #25 Garnish with curls of chocolate.
Step #26 Recipe created by Cathy Lee Lielausis with inspiration from Better Homes & Gardens New Cook Book & an old Kraft recipe.
Step #27 REG3 shared by Cathy Lee Lielausis, New Hampshire, USA Per serving: 301 Calories; 18g Fat (52% calories from fat); 3g Protein; 35g Carbohydrate; 78mg Cholesterol; 109mg Sodium.