The duo will now remain at the club until the summer of 2015, much to the delight of manager Gareth Ainsworth.
"It's fantastic news for the club and the future of the club. I want to protect our assets and these two are certainly assets for the football club," he told the club's website.
"They've shown they are talented but they will get even better because they've got more to learn and they will develop."
McClure is a striker with nine goals in 18 appearances this season, while Ingram is a goalkeeper who initially joined the club on loan from Oxford City.
"Matty has shown he can score goals in the first team and I believe he will go on to score goals at a higher level," Ainsworth added.
"The other Matt has been impressive in training and is doing fantastically well on loan at Oxford City. He will be a top keeper one day.
"I'm very pleased because I felt it was important to keep them both at the club."
Wycombe take on Bristol Rovers away from home in League Two this weekend.