Chocolate Covered Brownie Ice Cream Sandwiches

Chocolate Covered Brownie Ice Cream Sandwiches
Ingredients
For the Brownies:
1 stick (8 tablespoons) unsalted butter, at room temperature
1 cup granulated sugar
2 tablespoons cocoa, plus more for pan
2 eggs
1 teaspoon pure vanilla extract
3/4 cup flour
pinch of kosher salt
For the Ice Cream Sandwiches:
1 quart vanilla ice cream, slightly softened
2 pounds chocolate chips
1 teaspoon oil
Source Link: http://www.goodlifeeats.com/2011/06/chocolate-covered-brownie-ice-cream-sandwich-recipe.html