Following day, Netzhammer handed in second submission: for ISIS cake

Walmart has been forced to apologize after it apparently agreed to bake an ISIS-themed cake for a Louisiana customer - just a day after refusing to create a Confederate battle flag cake for him.

Chuck Netzhammer submitted a request for a cake featuring a photo of the Confederate flag, with the slogan 'Heritage Not Hate' printed across it, to his local Walmart store in Slidell on Thursday.

The store reportedly denied his request, which was made just a week after the Charleston, South Carolina, church massacre. Bakery staff wrote 'cannot do cake' on Netzhammer's submission.

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'Mistake': Walmart has been forced to apologize after it apparently agreed to bake this ISIS-themed cake for customer Chuck Netzhammer - just a day after refusing to create a Confederate battle flag cake for him

Contrast: In a YouTube video, Netzhammer explains how his local Walmart store in Slidell, Louisiana, refused to ice this photo (left) of the Confederate flag on a cake - but agreed to make him an Islamic State creation. Right, Netzhammer shows off the ISIS-themed cake, which Walmart has since apologized for baking

The following day, Netzhammer handed in a second cake request - this time, for a baked creation featuring an iced version of the Islamic State's black and white flag - to test the store's convictions.

Incredibly, Walmart reportedly baked and iced the terror group-themed cake.

On Friday, Netzhammer took to YouTube to express his disbelief at the store's actions.

'Alright, Wal-Mart, you’ve got some explaining to do. I went to go buy a cake from you all the other day with this image on it and y’all wouldn’t do it,' he says in a video he later posted to the site.

'I went back yesterday and managed to get the ISIS battle flag [cake instead].'

In the caption written below the video on YouTube, the angry customer adds: 'ISIS is beheading Christians, selling little girls into slavery, and is currently a terrorist org at war with the United States........but you can't buy the General Lee toy car at Wallmart? It's a damn shame.'

Denied: The Confederate flag image Netzhammer had requested featured the words 'Heritage Not Hate' on it

In his YouTube video, Netzhammer says: 'Alright, Wal-Mart, you’ve got some explaining to do. I went to go buy a cake from you all the other day with this image on it and y’all wouldn’t do it. I went back yesterday and managed to get the ISIS [cake].' Above, his denied Confederate flag submission (left) and the ISIS cake (right)

Store: The Islamic State-themed cake was apparently baked by staff at this Walmart (pictured) in Slidell, LA

Walmart spokesman Randy Hargrove told the Daily Caller that the store had 'made a mistake'.

'The cake in the video should not have been made and we apologize,' he said, explaining Walmart had 'made the decision to stop selling Confederate flag-related items promoting the flag's image'.

He added: '[Netzhammer] brought in the other image of ISIS and really, what happened, was our associate didn’t recognize what that image was and what it meant or it wouldn’t have been made.'

In the video, Netzhammer also posed with the ISIS cake and showed off his bakery receipts.

Suspect: On June 17, 21-year-old Dylann Roof, from Shelby, North Carolina, allegedly shot dead nine people at the historically black Emanuel African Methodist Episcopal Church in Charleston, South Carolina. Roof had posted photos of himself holding the Confederate flag (pictured) online in the months leading up to the killings

During the massacre at the historically black Emanuel African Methodist Episcopal Church on June 17, 21-year-old Dylann Roof, from Shelby, North Carolina, allegedly shot dead nine people.

These included the senior pastor and state senator, Clementa Pinckney.

Roof had visited some of the South's most notorious slave plantations and Confederate landmarks in the months leading up the killings, and had taken photos of himself holding the Confederate flag.