Stir together baking mix, poppy seeds, and lemon zest. Whisk together club soda, egg, and butter in a small bowl; gently whisk egg mixture into poppy seed mixture. (Mixture will be lumpy.) Let stand 3 minutes.
Cook batter in a preheated, oiled Belgian-style waffle iron until golden (about 3/4 to 1 cup batter each). Serve with Blackberry Maple Syrup and, if desired, crème fraîche. Garnish, if desired.
Note: If you don't have a Belgian-style waffle iron, use 1/2 cup batter for each waffle in a traditional waffle iron.
Try This Twist!
Lemon-Poppy Seed Pancakes: Prepare batter as directed. Pour about 1/4 cup batter for each pancake onto a hot, lightly greased griddle or large nonstick skillet. Cook pancakes 3 to 4 minutes or until tops are covered with bubbles and edges look dry and cooked; turn and cook other side.