Which of the following dishes is standardized to be shredded into 1/4" strands with fat evenly mixed?

The correct dish that is standardized to be shredded into 1/4" strands with fat evenly mixed is barbacoa. This specific preparation ensures that the meat has a consistent texture and flavor, allowing for an optimal eating experience. Barbacoa typically consists of beef that is slow-cooked with seasoning until it becomes tender enough to shred, and the mixing of fat is crucial as it adds moisture and richness to the dish.

In contrast, while carnitas are also shredded, they generally have a different preparation process, typically resulting in larger, chunkier strands that emphasize crispy texture. Chicken tacos utilize shredded chicken but are prepared differently, often resulting in a flakier texture and not adhering to the same standard of 1/4" strands. Steak burritos, on the other hand, typically feature sliced or diced steak rather than shredded. Each of these other options highlights different preparation methods that do not align with the specific standardization described for barbacoa.