Bring sweet tea to a boil in a medium saucepan over medium-high heat. Stir in brown basmati rice and reduce heat to low. Cover saucepan with lid and simmer 30 minutes. Remove from heat and let steam.
While rice is steaming, melt butter over med heat in a saucepan and add pecans. Cook pecans for about 4-5 minutes until fragrant. Add rice and cranberries and heat through.