The Bearcats outmatched the Trojans in every facet which led to a dominate 72-30 victory and their fifth trip to the Class 4 quarterfinals in six seasons.
Dexter was led by Krysten Garrison and Chaylea Mosby who each scored 16 points. Hannah Thurmon added 13 for the Bearcats, who shot 59 percent (26 of 44) from the field and had 10 players score.
Potosi, who finishes their season with a 13-15 mark, made its way to the sectional round after a magical run through District 2. As the last seed in a six-team tournament, the Trojans upset the top three seeds in Hillsboro, Festus and then No. 1 North County 41-40 in the championship game.
Peyton Blair, who was held to two points against Dexter, hit a three with eight seconds left to bury North County and cap an improbably title run for Potosi's first district championship since 2005.
The clock struck midnight on Potosi's magical playoff surge once Dexter found their first points.
The Bearcats led from wire to wire and quickly established an inside presence with Thurman and Garrison which the Trojans had no answer for.
Garrison scored eight of her 16 points while Thurmon pitched in six for a 19-4 Bearcat lead after the first eight minutes. Dexter's junior duo was too much for the Trojans around the basket.
Chaylea Mosby, Dexter's leading scorer who was held to seven points against Sikeston during the District 1 title game, found her rhythm again giving her team the outside presence to match their inside dominance.
Mosby hit her first three 3-pointers and was 6 for 7 from the field in the first half scoring 11 points in the second quarter alone. Her third and final three of the night put Dexter ahead 32-9 with 4:54 left in the second quarter.
"I thought we ran our offense well, got a lot of high-low looks and just really executed overall tonight," Allen said. "...You definitely want to establish that inside game as early as you can and I thought we did a great job of doing that. It opened up the outside and Chaylea knocked down some threes, Harley [Allen] knocked one down. I just thought we executed well offensively tonight."
Dexter's high-octane defense was also something Potosi wasn't equipped to handle. The Trojans had 19 turnovers and trailed 46-11 at the half. They finished with 29 turnovers on the game.
"Our bigs have not had to go against that kind of solid defense all year," Taylor said. "It was difficult. It was just tough. Tough to score around."
Potosi was led by Jenna Haynes and her 10 points while Olivia Coleman added seven for the Trojans, who shot 29 percent (11 of 38) from the field and were out-rebounded 25-15.
"[Dexter] is a solid, all-around, awesome team," Taylor said. "We knew going in that it was going to be tough. They have every position covered and in a very good way...They're a strong team and I hope good things for them."
Dexter (21-8) will take on Lutheran South (20-8) Saturday at 1:45 p.m. during a quarterfinal at Jefferson College in Hillsboro, Mo. Lutheran South defeated Clayton 62-57 during their sectional at Parkway West High School on Tuesday as well.
"It'll be the first time we played at Hillsboro so that will be new to us," Allen said. "We'll just have to watch some film and try to get prepared. I've watched Lutheran South already this year... We'll just get prepared and get ready to go this Saturday."
POTOSI (30) -- Olivia Coleman 7, Peyton Blair 2, Baylee Mercer 2, Allison Coleman 3, Kaley Haarman 2, Jenna Haynes 10, Shayla Jennings 4. FG 11 FT 7-8 F 16. (3-pointers: Coleman 1. Fouled out: none.)
DEXTER (72) -- Marcie Martin 4, Natalie Sitze 7, Megan Trout 3, Madyson Crockett 2, Cheyenne Mosby 2, Hannah Thurmon 13, Krysten Garrison 16, Harley Allen 6, Chaylea Mosby 16, Lauryn Davis 3. FG 26 FT 12-19 F 15. (3-pointers: Sitze 1, Trout 1, Allen 2, Cha. Mosby 3. Fouled out: none.)