Let’s roll up our sleeves and start cooking these delightful fritters:

1. In a large mixing bowl, combine the flour, baking powder, garlic powder, salt, and pepper. Mix well.
2. In another bowl, whisk together the eggs and milk until smooth. Pour this mixture into the dry ingredients, stirring until just combined.
3. Fold in the chopped shrimp, cilantro, green onions, and jalapeño (if using). The batter should be thick enough to hold its shape when scooped.
4. Heat oil in a large skillet over medium-high heat. You’ll need enough oil to cover the bottom of the pan generously.
5. Once the oil is hot, drop spoonfuls of the batter into the skillet, flattening them slightly with the back of the spoon. Cook for about 3 minutes on each side, or until golden brown and cooked through.
6. Transfer the cooked fritters to a paper towel-lined plate to drain excess oil.
7. For the lime mayonnaise, mix the mayonnaise, lime juice, and zest in a small bowl. Stir until smooth and creamy.
8. Serve the fritters hot, with the lime mayonnaise on the side for dipping.

From experience, I can tell you that these fritters are best enjoyed hot off the skillet, capturing that fresh and crispy essence.