Use a big bowl and add half of the confectioners sugar, lemon juice, salt, marshmallow cream, lemon extract, lemon zest, yellow food coloring, butter at room temperature and mix it together.
5 cups confectioners sugar, 2 ½ tbsp lemon juice, Pinch of salt, ¾ cup marshmallow cream, 1 tsp lemon extract, 2 lemons zested, 4 drops of yellow food coloring, ¼ cup unsalted butter