In medium bowl, stir together Bisquick mix, 1 cup milk and the eggs just until blended. Heat griddle or skillet over medium-high heat (375°F). Brush with vegetable oil if necessary (or spray with cooking spray before heating). For each pancake, pour 1/4 cup batter onto hot griddle. Sprinkle each with about 1 tablespoon of the crushed pretzels. Cook until edges are dry and bubbles form on top. Turn; cook other side until golden brown.