In the bowl of an electric mixer (attached with a paddle), beat the butter and shortening on high speed until smooth and creamy, about 2 minutes. Turning the mixer on low, add the powered sugar (1/2 the amount), vanilla, and 1 Tbsp of Almond milk, mixing them together until well combined. Add the remaining powered sugar and mix until well combined. **NOTE: If the frosting is too thick, add additional milk (1 Tsp at a time); if it’s too thin, add additional powered sugar (1 Tbsp at a time). Lastly, add a pinch of sea salt to balance sweetness and fold in the oreos until well incorporated.