01 - Combine warm milk, water, and yeast in a large bowl or stand mixer. Let stand for 5 minutes until mixture becomes foamy, indicating the yeast is active.
02 - Add sugar, melted butter, eggs, and salt to the yeast mixture. Mix on low speed until thoroughly combined, about 1 minute.
03 - Gradually incorporate flour, 1 cup at a time, mixing until a soft, slightly sticky dough forms. Knead on medium speed for 5–7 minutes until smooth, elastic, and pulls away from the sides of the bowl.
04 - Transfer dough to a lightly greased bowl, turning once to coat. Cover with plastic wrap or a clean towel and place in a warm, draft-free area. Let rise for 1–1.5 hours until doubled in bulk.
05 - Punch down risen dough to release air. Turn onto a lightly floured surface and roll to 1/2-inch thickness. Using a sharp knife or dough cutter, cut into 12 rectangles measuring approximately 4x1.5 inches.
06 - Arrange bars on parchment-lined baking sheets, leaving 2 inches of space between each. Cover loosely and let rise for 30–40 minutes until noticeably puffy and the dough springs back slowly when touched.
07 - Pour 2 inches of vegetable oil into a heavy-bottomed pot or Dutch oven. Heat to 350°F, maintaining temperature throughout frying using a deep-fry thermometer.
08 - Fry bars in batches of 3–4, cooking 1–2 minutes per side until deep golden brown. Use a slotted spoon to transfer to paper towels to drain excess oil.
09 - While bars fry, whisk powdered sugar, maple syrup, milk, vanilla, and salt in a medium bowl until completely smooth and ribbon-like in consistency.
10 - Dip the top of each slightly warm bar into the glaze, allowing excess to drip off. Place glazed bars on a wire rack set over parchment paper. Let glaze set for 15–20 minutes before serving.