For the ice cream:
For the brownie:
Mix the sugar and cocoa and beat together with the butter. Add 4 eggs, one at a time, integrating each of them. Then add the flour, salt, and vanilla, and mix well.
Once the mixture is ready, put in a previously greased baking pan. Bake at 400°F. Remove from the oven and cover the top with 1 package of mini marshmallows. Bake again for 3 minutes, until the marshmallows look soft and swollen.
For the ice cream:
Blend the raspberries with the lemon juice and sugar, set aside. Whip the cream, without letting it become too firm, and blend. Freeze.