A/N: Reviews are always welcome :D

Disclaimer: I don't own Supernatural.


Day 21 - Baking

"Cas," Dean's voice echoed around the lair of the old men of letters, "What are you doing?" He asked walking into the kitchen noting the angel rooting through the pots and measuring equipment while various ingredients were placed on the counter. Cas continued to walk around the kitchen, moving up and down, measuring ingredients, rarely looking at Dean. Something that Dean found odd.

"Hello Dean," Cas finally replied, moving some things into a bowl.

"What are you doing?" Dean questioned once again, watching him as he moved towards the coffee machine. Dean automatically grabbed a mug from a higher shelf.

"I have realised something," Cas said, pouring milk into the measuring cup, "We celebrated Sam's day of birth nearly four months ago," Dean hummed in agreement, remembering that day, "And recently, Sam inquired if I had a birthday." Dean's forehead crinkled in thought. Did angels have birthdays? Before he could ask, Castiel answered, "Angel's do not have birthdays. But Sam agreed that I should have one. So we decided that it would be today,"

Dean thought back, what was so special about today? As if Cas could read his mind, he continued once again while mixing the bowl, "Today is the day that I first showed myself to you and Bobby,"

"Ah," Dean muttered, sipping his coffee. He placed his coffee on the counter before moving towards the ingredients. He decided to ignore the cooking book that Cas had opened, he grabbed a smaller bowl.

The angel now looked at him in confusion, "What are you doing?" Cas asked, stopping his process.

"I have had to make Sammy's cake for at least 19 years before he left for Stanford," Dean explained, "I'm pretty damn good at making frosting,"

Cas just stared at him, his head tilting slightly, "Thank you, Dean," Cas finally said, moving towards the counter once again.

"Yeah, yeah," Dean muttered, moving towards Cas to finish helping him make the batter.

Later

"Happy birthday toooo you," Sam and Dean sung, bringing out the cake to Cas who was sitting on the table in the crappy motel room.

Cas let out a smile towards the Winchester brothers. There were only two candles on the cake, but it was something that brought another smile on the angel's usual stoic face. Cas closed his eyes, going through the human ritual of 'making a wish', he missed the way Dean's face lit up at the look on the angels face.