Over medium heat, combine all ice cream ingredients except bananas and bring to a simmer. Remove from heat and refrigerate until cold.
Line 3 loaf pans with parchment paper.
Divide & smooth into two lined loaf pans and freeze until firm.
In food processor, blend all bar ingredients until they are uniform consistency, no large chunks.
Press half of the bar mixture in your lined loaf pan. Place a layer of parchment on top of that, then press the other half of mixture on top, creating 2 layers of brownies. Refrigerate until chilled.
Once ice cream is frozen, peel off parchment from all three loaf pans and place ice cream between bars.