01 - Combine warm milk and yeast in a large bowl. Let stand for 5 minutes until foamy.
02 - Add sugar, melted butter, eggs, and salt to the yeast mixture. Mix well. Gradually add flour, mixing until a soft dough forms.
03 - Knead the dough on a lightly floured surface for 6 to 8 minutes until smooth and elastic.
04 - Place the dough in a greased bowl, cover, and let rise in a warm place for 1 hour or until doubled in size.
05 - Punch down the dough and roll into a 16x10 inch rectangle. Spread softened butter evenly over the dough. Sprinkle with brown sugar and cinnamon.
06 - Roll up the dough tightly from the long side; pinch the seam to seal.
07 - Cut into 12 equal pieces. Unroll each piece slightly and pinch one end to form ears, leaving the center rounded for the face.
08 - Place shaped rolls on a parchment-lined baking sheet, spacing 2 inches apart. Cover and let rise for 20 minutes.
09 - Preheat the oven to 350°F. Bake for 18 to 20 minutes until golden brown.
10 - Mix powdered sugar, milk, and vanilla to make icing. Drizzle over warm rolls. Add chocolate chips or raisins for eyes and pink sprinkles for noses, if desired.
11 - Let cool slightly before serving.